Science.gov

Sample records for underlying file system

  1. Accessing files in an internet - The Jade file system

    NASA Technical Reports Server (NTRS)

    Rao, Herman C.; Peterson, Larry L.

    1993-01-01

    Jade is a new distribution file system that provides a uniform way to name and access files in an internet environment. It makes two important contributions. First, Jade is a logical system that integrates a heterogeneous collection of existing file systems, where heterogeneous means that the underlying file systems support different file access protocols. Jade is designed under the restriction that the underlying file system may not be modified. Second, rather than providing a global name space, Jade permits each user to define a private name space. These private name spaces support two novel features: they allow multiple file systems to be mounted under one directory, and they allow one logical name space to mount other logical name spaces. A prototype of the Jade File System was implemented on Sun Workstations running Unix. It consists of interfaces to the Unix file system, the Sun Network File System, the Andrew File System, and FTP. This paper motivates Jade's design, highlights several aspects of its implementation, and illustrates applications that can take advantage of its features.

  2. Accessing files in an Internet: The Jade file system

    NASA Technical Reports Server (NTRS)

    Peterson, Larry L.; Rao, Herman C.

    1991-01-01

    Jade is a new distribution file system that provides a uniform way to name and access files in an internet environment. It makes two important contributions. First, Jade is a logical system that integrates a heterogeneous collection of existing file systems, where heterogeneous means that the underlying file systems support different file access protocols. Jade is designed under the restriction that the underlying file system may not be modified. Second, rather than providing a global name space, Jade permits each user to define a private name space. These private name spaces support two novel features: they allow multiple file systems to be mounted under one directory, and they allow one logical name space to mount other logical name spaces. A prototype of the Jade File System was implemented on Sun Workstations running Unix. It consists of interfaces to the Unix file system, the Sun Network File System, the Andrew File System, and FTP. This paper motivates Jade's design, highlights several aspects of its implementation, and illustrates applications that can take advantage of its features.

  3. The Global File System

    NASA Technical Reports Server (NTRS)

    Soltis, Steven R.; Ruwart, Thomas M.; OKeefe, Matthew T.

    1996-01-01

    The global file system (GFS) is a prototype design for a distributed file system in which cluster nodes physically share storage devices connected via a network-like fiber channel. Networks and network-attached storage devices have advanced to a level of performance and extensibility so that the previous disadvantages of shared disk architectures are no longer valid. This shared storage architecture attempts to exploit the sophistication of storage device technologies whereas a server architecture diminishes a device's role to that of a simple component. GFS distributes the file system responsibilities across processing nodes, storage across the devices, and file system resources across the entire storage pool. GFS caches data on the storage devices instead of the main memories of the machines. Consistency is established by using a locking mechanism maintained by the storage devices to facilitate atomic read-modify-write operations. The locking mechanism is being prototyped in the Silicon Graphics IRIX operating system and is accessed using standard Unix commands and modules.

  4. Experiences on File Systems: Which is the best file system for you?

    NASA Astrophysics Data System (ADS)

    Blomer, J.

    2015-12-01

    The distributed file system landscape is scattered. Besides a plethora of research file systems, there is also a large number of production grade file systems with various strengths and weaknesses. The file system, as an abstraction of permanent storage, is appealing because it provides application portability and integration with legacy and third-party applications, including UNIX utilities. On the other hand, the general and simple file system interface makes it notoriously difficult for a distributed file system to perform well under a variety of different workloads. This contribution provides a taxonomy of commonly used distributed file systems and points out areas of research and development that are particularly important for high-energy physics.

  5. DMFS: A Data Migration File System for NetBSD

    NASA Technical Reports Server (NTRS)

    Studenmund, William

    1999-01-01

    I have recently developed dmfs, a Data Migration File System, for NetBSD. This file system is based on the overlay file system, which is discussed in a separate paper, and provides kernel support for the data migration system being developed by my research group here at NASA/Ames. The file system utilizes an underlying file store to provide the file backing, and coordinates user and system access to the files. It stores its internal meta data in a flat file, which resides on a separate file system. Our data migration system provides archiving and file migration services. System utilities scan the dmfs file system for recently modified files, and archive them to two separate tape stores. Once a file has been doubly archived, files larger than a specified size will be truncated to that size, potentially freeing up large amounts of the underlying file store. Some sites will choose to retain none of the file (deleting its contents entirely from the file system) while others may choose to retain a portion, for instance a preamble describing the remainder of the file. The dmfs layer coordinates access to the file, retaining user-perceived access and modification times, file size, and restricting access to partially migrated files to the portion actually resident. When a user process attempts to read from the non-resident portion of a file, it is blocked and the dmfs layer sends a request to a system daemon to restore the file. As more of the file becomes resident, the user process is permitted to begin accessing the now-resident portions of the file. For simplicity, our data migration system divides a file into two portions, a resident portion followed by an optional non-resident portion. Also, a file is in one of three states: fully resident, fully resident and archived, and (partially) non-resident and archived. For a file which is only partially resident, any attempt to write or truncate the file, or to read a non-resident portion, will trigger a file restoration

  6. A Survey on Distributed File System Technology

    NASA Astrophysics Data System (ADS)

    Blomer, J.

    2015-05-01

    Distributed file systems provide a fundamental abstraction to location-transparent, permanent storage. They allow distributed processes to co-operate on hierarchically organized data beyond the life-time of each individual process. The great power of the file system interface lies in the fact that applications do not need to be modified in order to use distributed storage. On the other hand, the general and simple file system interface makes it notoriously difficult for a distributed file system to perform well under a variety of different workloads. This has lead to today's landscape with a number of popular distributed file systems, each tailored to a specific use case. Early distributed file systems merely execute file system calls on a remote server, which limits scalability and resilience to failures. Such limitations have been greatly reduced by modern techniques such as distributed hash tables, content-addressable storage, distributed consensus algorithms, or erasure codes. In the light of upcoming scientific data volumes at the exabyte scale, two trends are emerging. First, the previously monolithic design of distributed file systems is decomposed into services that independently provide a hierarchical namespace, data access, and distributed coordination. Secondly, the segregation of storage and computing resources yields to a storage architecture in which every compute node also participates in providing persistent storage.

  7. The Galley Parallel File System

    NASA Technical Reports Server (NTRS)

    Nieuwejaar, Nils; Kotz, David

    1996-01-01

    As the I/O needs of parallel scientific applications increase, file systems for multiprocessors are being designed to provide applications with parallel access to multiple disks. Many parallel file systems present applications with a conventional Unix-like interface that allows the application to access multiple disks transparently. The interface conceals the parallelism within the file system, which increases the ease of programmability, but makes it difficult or impossible for sophisticated programmers and libraries to use knowledge about their I/O needs to exploit that parallelism. Furthermore, most current parallel file systems are optimized for a different workload than they are being asked to support. We introduce Galley, a new parallel file system that is intended to efficiently support realistic parallel workloads. We discuss Galley's file structure and application interface, as well as an application that has been implemented using that interface.

  8. The Galley Parallel File System

    NASA Technical Reports Server (NTRS)

    Nieuwejaar, Nils; Kotz, David

    1996-01-01

    Most current multiprocessor file systems are designed to use multiple disks in parallel, using the high aggregate bandwidth to meet the growing I/0 requirements of parallel scientific applications. Many multiprocessor file systems provide applications with a conventional Unix-like interface, allowing the application to access multiple disks transparently. This interface conceals the parallelism within the file system, increasing the ease of programmability, but making it difficult or impossible for sophisticated programmers and libraries to use knowledge about their I/O needs to exploit that parallelism. In addition to providing an insufficient interface, most current multiprocessor file systems are optimized for a different workload than they are being asked to support. We introduce Galley, a new parallel file system that is intended to efficiently support realistic scientific multiprocessor workloads. We discuss Galley's file structure and application interface, as well as the performance advantages offered by that interface.

  9. NASA work unit system file maintenance manual

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The NASA Work Unit System is a management information system for research tasks (i.e., work units) performed under NASA grants and contracts. It supplies profiles on research efforts and statistics on fund distribution. The file maintenance operator can add, delete and change records at a remote terminal or can submit punched cards to the computer room for batch update. The system is designed for file maintenance by a person with little or no knowledge of data processing techniques.

  10. DMFS: A Data Migration File System for NetBSD

    NASA Technical Reports Server (NTRS)

    Studenmund, William

    2000-01-01

    I have recently developed DMFS, a Data Migration File System, for NetBSD. This file system provides kernel support for the data migration system being developed by my research group at NASA/Ames. The file system utilizes an underlying file store to provide the file backing, and coordinates user and system access to the files. It stores its internal metadata in a flat file, which resides on a separate file system. This paper will first describe our data migration system to provide a context for DMFS, then it will describe DMFS. It also will describe the changes to NetBSD needed to make DMFS work. Then it will give an overview of the file archival and restoration procedures, and describe how some typical user actions are modified by DMFS. Lastly, the paper will present simple performance measurements which indicate that there is little performance loss due to the use of the DMFS layer.

  11. 19 CFR 191.0a - Claims filed under NAFTA.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 2 2011-04-01 2011-04-01 false Claims filed under NAFTA. 191.0a Section 191.0a Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) DRAWBACK § 191.0a Claims filed under NAFTA. Claims for drawback filed under...

  12. 19 CFR 191.0a - Claims filed under NAFTA.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Claims filed under NAFTA. 191.0a Section 191.0a Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) DRAWBACK § 191.0a Claims filed under NAFTA. Claims for drawback filed under...

  13. The Jade File System. Ph.D. Thesis

    NASA Technical Reports Server (NTRS)

    Rao, Herman Chung-Hwa

    1991-01-01

    File systems have long been the most important and most widely used form of shared permanent storage. File systems in traditional time-sharing systems, such as Unix, support a coherent sharing model for multiple users. Distributed file systems implement this sharing model in local area networks. However, most distributed file systems fail to scale from local area networks to an internet. Four characteristics of scalability were recognized: size, wide area, autonomy, and heterogeneity. Owing to size and wide area, techniques such as broadcasting, central control, and central resources, which are widely adopted by local area network file systems, are not adequate for an internet file system. An internet file system must also support the notion of autonomy because an internet is made up by a collection of independent organizations. Finally, heterogeneity is the nature of an internet file system, not only because of its size, but also because of the autonomy of the organizations in an internet. The Jade File System, which provides a uniform way to name and access files in the internet environment, is presented. Jade is a logical system that integrates a heterogeneous collection of existing file systems, where heterogeneous means that the underlying file systems support different file access protocols. Because of autonomy, Jade is designed under the restriction that the underlying file systems may not be modified. In order to avoid the complexity of maintaining an internet-wide, global name space, Jade permits each user to define a private name space. In Jade's design, we pay careful attention to avoiding unnecessary network messages between clients and file servers in order to achieve acceptable performance. Jade's name space supports two novel features: (1) it allows multiple file systems to be mounted under one direction; and (2) it permits one logical name space to mount other logical name spaces. A prototype of Jade was implemented to examine and validate its

  14. Tuning HDF5 for Lustre File Systems

    SciTech Connect

    Howison, Mark; Koziol, Quincey; Knaak, David; Mainzer, John; Shalf, John

    2010-09-24

    HDF5 is a cross-platform parallel I/O library that is used by a wide variety of HPC applications for the flexibility of its hierarchical object-database representation of scientific data. We describe our recent work to optimize the performance of the HDF5 and MPI-IO libraries for the Lustre parallel file system. We selected three different HPC applications to represent the diverse range of I/O requirements, and measured their performance on three different systems to demonstrate the robustness of our optimizations across different file system configurations and to validate our optimization strategy. We demonstrate that the combined optimizations improve HDF5 parallel I/O performance by up to 33 times in some cases running close to the achievable peak performance of the underlying file system and demonstrate scalable performance up to 40,960-way concurrency.

  15. The Future of the Andrew File System

    ScienceCinema

    None

    2011-04-25

    The talk will discuss the ten operational capabilities that have made AFS unique in the distributed file system space and how these capabilities are being expanded upon to meet the needs of the 21st century. Derrick Brashear and Jeffrey Altman will present a technical road map of new features and technical innovations that are under development by the OpenAFS community and Your File System, Inc. funded by a U.S. Department of Energy Small Business Innovative Research grant. The talk will end with a comparison of AFS to its modern days competitors.

  16. The Future of the Andrew File System

    SciTech Connect

    2011-02-23

    The talk will discuss the ten operational capabilities that have made AFS unique in the distributed file system space and how these capabilities are being expanded upon to meet the needs of the 21st century. Derrick Brashear and Jeffrey Altman will present a technical road map of new features and technical innovations that are under development by the OpenAFS community and Your File System, Inc. funded by a U.S. Department of Energy Small Business Innovative Research grant. The talk will end with a comparison of AFS to its modern days competitors.

  17. Remote file inquiry (RFI) system

    NASA Technical Reports Server (NTRS)

    1975-01-01

    System interrogates and maintains user-definable data files from remote terminals, using English-like, free-form query language easily learned by persons not proficient in computer programming. System operates in asynchronous mode, allowing any number of inquiries within limitation of available core to be active concurrently.

  18. Beyond a Terabyte File System

    NASA Technical Reports Server (NTRS)

    Powers, Alan K.

    1994-01-01

    The Numerical Aerodynamics Simulation Facility's (NAS) CRAY C916/1024 accesses a "virtual" on-line file system, which is expanding beyond a terabyte of information. This paper will present some options to fine tuning Data Migration Facility (DMF) to stretch the online disk capacity and explore the transitions to newer devices (STK 4490, ER90, RAID).

  19. 19 CFR 191.12 - Claim filed under incorrect provision.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 2 2013-04-01 2013-04-01 false Claim filed under incorrect provision. 191.12... drawback is not allowable under the provision as originally filed, but that it is allowable under such other provision. To be allowable under such other provision, the claim must meet each of...

  20. 19 CFR 191.12 - Claim filed under incorrect provision.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Claim filed under incorrect provision. 191.12... drawback is not allowable under the provision as originally filed, but that it is allowable under such other provision. To be allowable under such other provision, the claim must meet each of...

  1. 19 CFR 191.12 - Claim filed under incorrect provision.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 2 2014-04-01 2014-04-01 false Claim filed under incorrect provision. 191.12... drawback is not allowable under the provision as originally filed, but that it is allowable under such other provision. To be allowable under such other provision, the claim must meet each of...

  2. 19 CFR 191.12 - Claim filed under incorrect provision.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 2 2011-04-01 2011-04-01 false Claim filed under incorrect provision. 191.12... drawback is not allowable under the provision as originally filed, but that it is allowable under such other provision. To be allowable under such other provision, the claim must meet each of...

  3. 19 CFR 191.12 - Claim filed under incorrect provision.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 2 2012-04-01 2012-04-01 false Claim filed under incorrect provision. 191.12... drawback is not allowable under the provision as originally filed, but that it is allowable under such other provision. To be allowable under such other provision, the claim must meet each of...

  4. Improving File System Performance by Striping

    NASA Technical Reports Server (NTRS)

    Lam, Terance L.; Kutler, Paul (Technical Monitor)

    1998-01-01

    This document discusses the performance and advantages of striped file systems on the SGI AD workstations. Performance of several striped file system configurations are compared and guidelines for optimal striping are recommended.

  5. Zebra: A striped network file system

    NASA Technical Reports Server (NTRS)

    Hartman, John H.; Ousterhout, John K.

    1992-01-01

    The design of Zebra, a striped network file system, is presented. Zebra applies ideas from log-structured file system (LFS) and RAID research to network file systems, resulting in a network file system that has scalable performance, uses its servers efficiently even when its applications are using small files, and provides high availability. Zebra stripes file data across multiple servers, so that the file transfer rate is not limited by the performance of a single server. High availability is achieved by maintaining parity information for the file system. If a server fails its contents can be reconstructed using the contents of the remaining servers and the parity information. Zebra differs from existing striped file systems in the way it stripes file data: Zebra does not stripe on a per-file basis; instead it stripes the stream of bytes written by each client. Clients write to the servers in units called stripe fragments, which are analogous to segments in an LFS. Stripe fragments contain file blocks that were written recently, without regard to which file they belong. This method of striping has numerous advantages over per-file striping, including increased server efficiency, efficient parity computation, and elimination of parity update.

  6. The File Manager System

    PubMed Central

    Timson, George

    1980-01-01

    A database system written in Standard MUMPS has been implemented at a dozen Veterans Administration sites. While originally designed as a tool for programmers, the package can also be run as a standalone “programmerless” system. Through terminal dialogues, non-technical users can create, edit and store database schemas, and input and output “programs”.

  7. Texas Natural Resources Information System. File Description Report.

    ERIC Educational Resources Information Center

    Interagency Council on Natural Resources and the Environment, Austin, TX. Texas Natural Resources Information System.

    Descriptions are given for the 164 computerized files that comprise the Texas Natural Resources Information System (TNRIS). The system provides natural resources information to federal, state, regional, and local and private entities. File descriptions are organized under the following data and information content areas: (1) base data, (2)…

  8. A Metadata-Rich File System

    SciTech Connect

    Ames, S; Gokhale, M B; Maltzahn, C

    2009-01-07

    Despite continual improvements in the performance and reliability of large scale file systems, the management of file system metadata has changed little in the past decade. The mismatch between the size and complexity of large scale data stores and their ability to organize and query their metadata has led to a de facto standard in which raw data is stored in traditional file systems, while related, application-specific metadata is stored in relational databases. This separation of data and metadata requires considerable effort to maintain consistency and can result in complex, slow, and inflexible system operation. To address these problems, we have developed the Quasar File System (QFS), a metadata-rich file system in which files, metadata, and file relationships are all first class objects. In contrast to hierarchical file systems and relational databases, QFS defines a graph data model composed of files and their relationships. QFS includes Quasar, an XPATH-extended query language for searching the file system. Results from our QFS prototype show the effectiveness of this approach. Compared to the defacto standard, the QFS prototype shows superior ingest performance and comparable query performance on user metadata-intensive operations and superior performance on normal file metadata operations.

  9. Deceit: A flexible distributed file system

    NASA Technical Reports Server (NTRS)

    Siegel, Alex; Birman, Kenneth; Marzullo, Keith

    1989-01-01

    Deceit, a distributed file system (DFS) being developed at Cornell, focuses on flexible file semantics in relation to efficiency, scalability, and reliability. Deceit servers are interchangeable and collectively provide the illusion of a single, large server machine to any clients of the Deceit service. Non-volatile replicas of each file are stored on a subset of the file servers. The user is able to set parameters on a file to achieve different levels of availability, performance, and one-copy serializability. Deceit also supports a file version control mechanism. In contrast with many recent DFS efforts, Deceit can behave like a plain Sun Network File System (NFS) server and can be used by any NFS client without modifying any client software. The current Deceit prototype uses the ISIS Distributed Programming Environment for all communication and process group management, an approach that reduces system complexity and increases system robustness.

  10. Flexibility and Performance of Parallel File Systems

    NASA Technical Reports Server (NTRS)

    Kotz, David; Nieuwejaar, Nils

    1996-01-01

    As we gain experience with parallel file systems, it becomes increasingly clear that a single solution does not suit all applications. For example, it appears to be impossible to find a single appropriate interface, caching policy, file structure, or disk-management strategy. Furthermore, the proliferation of file-system interfaces and abstractions make applications difficult to port. We propose that the traditional functionality of parallel file systems be separated into two components: a fixed core that is standard on all platforms, encapsulating only primitive abstractions and interfaces, and a set of high-level libraries to provide a variety of abstractions and application-programmer interfaces (API's). We present our current and next-generation file systems as examples of this structure. Their features, such as a three-dimensional file structure, strided read and write interfaces, and I/O-node programs, are specifically designed with the flexibility and performance necessary to support a wide range of applications.

  11. Adding Data Management Services to Parallel File Systems

    SciTech Connect

    Brandt, Scott

    2015-03-04

    The objective of this project, called DAMASC for “Data Management in Scientific Computing”, is to coalesce data management with parallel file system management to present a declarative interface to scientists for managing, querying, and analyzing extremely large data sets efficiently and predictably. Managing extremely large data sets is a key challenge of exascale computing. The overhead, energy, and cost of moving massive volumes of data demand designs where computation is close to storage. In current architectures, compute/analysis clusters access data in a physically separate parallel file system and largely leave it scientist to reduce data movement. Over the past decades the high-end computing community has adopted middleware with multiple layers of abstractions and specialized file formats such as NetCDF-4 and HDF5. These abstractions provide a limited set of high-level data processing functions, but have inherent functionality and performance limitations: middleware that provides access to the highly structured contents of scientific data files stored in the (unstructured) file systems can only optimize to the extent that file system interfaces permit; the highly structured formats of these files often impedes native file system performance optimizations. We are developing Damasc, an enhanced high-performance file system with native rich data management services. Damasc will enable efficient queries and updates over files stored in their native byte-stream format while retaining the inherent performance of file system data storage via declarative queries and updates over views of underlying files. Damasc has four key benefits for the development of data-intensive scientific code: (1) applications can use important data-management services, such as declarative queries, views, and provenance tracking, that are currently available only within database systems; (2) the use of these services becomes easier, as they are provided within a familiar file

  12. Storing files in a parallel computing system using list-based index to identify replica files

    DOEpatents

    Faibish, Sorin; Bent, John M.; Tzelnic, Percy; Zhang, Zhenhua; Grider, Gary

    2015-07-21

    Improved techniques are provided for storing files in a parallel computing system using a list-based index to identify file replicas. A file and at least one replica of the file are stored in one or more storage nodes of the parallel computing system. An index for the file comprises at least one list comprising a pointer to a storage location of the file and a storage location of the at least one replica of the file. The file comprises one or more of a complete file and one or more sub-files. The index may also comprise a checksum value for one or more of the file and the replica(s) of the file. The checksum value can be evaluated to validate the file and/or the file replica(s). A query can be processed using the list.

  13. Prefetching in file systems for MIMD multiprocessors

    NASA Technical Reports Server (NTRS)

    Kotz, David F.; Ellis, Carla Schlatter

    1990-01-01

    The question of whether prefetching blocks on the file into the block cache can effectively reduce overall execution time of a parallel computation, even under favorable assumptions, is considered. Experiments have been conducted with an interleaved file system testbed on the Butterfly Plus multiprocessor. Results of these experiments suggest that (1) the hit ratio, the accepted measure in traditional caching studies, may not be an adequate measure of performance when the workload consists of parallel computations and parallel file access patterns, (2) caching with prefetching can significantly improve the hit ratio and the average time to perform an I/O (input/output) operation, and (3) an improvement in overall execution time has been observed in most cases. In spite of these gains, prefetching sometimes results in increased execution times (a negative result, given the optimistic nature of the study). The authors explore why it is not trivial to translate savings on individual I/O requests into consistently better overall performance and identify the key problems that need to be addressed in order to improve the potential of prefetching techniques in the environment.

  14. Design and Implementation of Ceph: A Scalable Distributed File System

    SciTech Connect

    Weil, S A; Brandt, S A; Miller, E L; Long, D E; Maltzahn, C

    2006-04-19

    File system designers continue to look to new architectures to improve scalability. Object-based storage diverges from server-based (e.g. NFS) and SAN-based storage systems by coupling processors and memory with disk drives, delegating low-level allocation to object storage devices (OSDs) and decoupling I/O (read/write) from metadata (file open/close) operations. Even recent object-based systems inherit decades-old architectural choices going back to early UNIX file systems, however, limiting their ability to effectively scale to hundreds of petabytes. We present Ceph, a distributed file system that provides excellent performance and reliability with unprecedented scalability. Ceph maximizes the separation between data and metadata management by replacing allocation tables with a pseudo-random data distribution function (CRUSH) designed for heterogeneous and dynamic clusters of unreliable OSDs. We leverage OSD intelligence to distribute data replication, failure detection and recovery with semi-autonomous OSDs running a specialized local object storage file system (EBOFS). Finally, Ceph is built around a dynamic distributed metadata management cluster that provides extremely efficient metadata management that seamlessly adapts to a wide range of general purpose and scientific computing file system workloads. We present performance measurements under a variety of workloads that show superior I/O performance and scalable metadata management (more than a quarter million metadata ops/sec).

  15. Small file aggregation in a parallel computing system

    DOEpatents

    Faibish, Sorin; Bent, John M.; Tzelnic, Percy; Grider, Gary; Zhang, Jingwang

    2014-09-02

    Techniques are provided for small file aggregation in a parallel computing system. An exemplary method for storing a plurality of files generated by a plurality of processes in a parallel computing system comprises aggregating the plurality of files into a single aggregated file; and generating metadata for the single aggregated file. The metadata comprises an offset and a length of each of the plurality of files in the single aggregated file. The metadata can be used to unpack one or more of the files from the single aggregated file.

  16. [PVFS 2000: An operational parallel file system for Beowulf

    NASA Technical Reports Server (NTRS)

    Ligon, Walt

    2004-01-01

    The approach has been to develop Parallel Virtual File System version 2 (PVFS2) , retaining the basic philosophy of the original file system but completely rewriting the code. It shows the architecture of the server and client components. BMI - BMI is the network abstraction layer. It is designed with a common driver and modules for each protocol supported. The interface is non-blocking, and provides mechanisms for optimizations including pinning user buffers. Currently TCP/IP and GM(Myrinet) modules have been implemented. Trove -Trove is the storage abstraction layer. It provides for storing both data spaces and name/value pairs. Trove can also be implemented using different underlying storage mechanisms including native files, raw disk partitions, SQL and other databases. The current implementation uses native files for data spaces and Berkeley db for name/value pairs.

  17. Performance of the Galley Parallel File System

    NASA Technical Reports Server (NTRS)

    Nieuwejaar, Nils; Kotz, David

    1996-01-01

    As the input/output (I/O) needs of parallel scientific applications increase, file systems for multiprocessors are being designed to provide applications with parallel access to multiple disks. Many parallel file systems present applications with a conventional Unix-like interface that allows the application to access multiple disks transparently. This interface conceals the parallism within the file system, which increases the ease of programmability, but makes it difficult or impossible for sophisticated programmers and libraries to use knowledge about their I/O needs to exploit that parallelism. Furthermore, most current parallel file systems are optimized for a different workload than they are being asked to support. We introduce Galley, a new parallel file system that is intended to efficiently support realistic parallel workloads. Initial experiments, reported in this paper, indicate that Galley is capable of providing high-performance 1/O to applications the applications that rely on them. In Section 3 we describe that access data in patterns that have been observed to be common.

  18. Performance of the IBM General Parallel File System

    SciTech Connect

    Jones, T.; Koniges, A.; Yates, R.K.

    1999-09-27

    Experimental performance analysis is a necessary first step in input/output software tuning and real-time environment code performance prediction. We measure the performance and scalability of IBM's General Parallel File System (GPFS) under a variety of conditions. The measurements are based on a set of benchmark codes that allow us to vary block sizes, access patterns, etc., and to measure aggregate throughput rates. We use the data to give performance recommendations for application development and as a guide to the improvement of parallel file systems.

  19. Public Document Room file classification system

    SciTech Connect

    Not Available

    1982-06-01

    This listing contains detailed descriptions of the file classification system for documents available from the Public Document Room (PDR) of the US Nuclear Regulatory Commission. As a public service branch of the agency, the PDR maintains facilities for receiving, processing, storing, and retrieving documents which NRC generates or receives in performing its regulatory function. Unlike a library, the PDR does not maintain collections of formally published materials, such as books, monographs, serials, periodicals, or general indexes. The documents on file at the PDR can be reports, written records of meetings (transcripts), existing or proposed regulations, the text of licenses or their amendments, and correspondence.

  20. The parallel virtual file system for portals.

    SciTech Connect

    Schutt, James Alan

    2004-04-01

    This report presents the result of an effort to re-implement the Parallel Virtual File System (PVFS) using Portals as the transport. This report provides short overviews of PVFS and Portals, and describes the design and implementation of PVFS over Portals. Finally, the results of performance testing of both stock PVFS and PVFS over Portals are presented.

  1. Collective operations in a file system based execution model

    DOEpatents

    Shinde, Pravin; Van Hensbergen, Eric

    2013-02-12

    A mechanism is provided for group communications using a MULTI-PIPE synthetic file system. A master application creates a multi-pipe synthetic file in the MULTI-PIPE synthetic file system, the master application indicating a multi-pipe operation to be performed. The master application then writes a header-control block of the multi-pipe synthetic file specifying at least one of a multi-pipe synthetic file system name, a message type, a message size, a specific destination, or a specification of the multi-pipe operation. Any other application participating in the group communications then opens the same multi-pipe synthetic file. A MULTI-PIPE file system module then implements the multi-pipe operation as identified by the master application. The master application and the other applications then either read or write operation messages to the multi-pipe synthetic file and the MULTI-PIPE synthetic file system module performs appropriate actions.

  2. Collective operations in a file system based execution model

    DOEpatents

    Shinde, Pravin; Van Hensbergen, Eric

    2013-02-19

    A mechanism is provided for group communications using a MULTI-PIPE synthetic file system. A master application creates a multi-pipe synthetic file in the MULTI-PIPE synthetic file system, the master application indicating a multi-pipe operation to be performed. The master application then writes a header-control block of the multi-pipe synthetic file specifying at least one of a multi-pipe synthetic file system name, a message type, a message size, a specific destination, or a specification of the multi-pipe operation. Any other application participating in the group communications then opens the same multi-pipe synthetic file. A MULTI-PIPE file system module then implements the multi-pipe operation as identified by the master application. The master application and the other applications then either read or write operation messages to the multi-pipe synthetic file and the MULTI-PIPE synthetic file system module performs appropriate actions.

  3. Distributed Data Management and Distributed File Systems

    NASA Astrophysics Data System (ADS)

    Girone, Maria

    2015-12-01

    The LHC program has been successful in part due to the globally distributed computing resources used for collecting, serving, processing, and analyzing the large LHC datasets. The introduction of distributed computing early in the LHC program spawned the development of new technologies and techniques to synchronize information and data between physically separated computing centers. Two of the most challenges services are the distributed file systems and the distributed data management systems. In this paper I will discuss how we have evolved from local site services to more globally independent services in the areas of distributed file systems and data management and how these capabilities may continue to evolve into the future. I will address the design choices, the motivations, and the future evolution of the computing systems used for High Energy Physics.

  4. Compiler-Directed File Layout Optimization for Hierarchical Storage Systems

    DOE PAGESBeta

    Ding, Wei; Zhang, Yuanrui; Kandemir, Mahmut; Son, Seung Woo

    2013-01-01

    File layout of array data is a critical factor that effects the behavior of storage caches, and has so far taken not much attention in the context of hierarchical storage systems. The main contribution of this paper is a compiler-driven file layout optimization scheme for hierarchical storage caches. This approach, fully automated within an optimizing compiler, analyzes a multi-threaded application code and determines a file layout for each disk-resident array referenced by the code, such that the performance of the target storage cache hierarchy is maximized. We tested our approach using 16 I/O intensive application programs and compared its performancemore » against two previously proposed approaches under different cache space management schemes. Our experimental results show that the proposed approach improves the execution time of these parallel applications by 23.7% on average.« less

  5. File System Support for Digital Evidence Bags

    NASA Astrophysics Data System (ADS)

    Richard, Golden; Roussev, Vassil

    Digital Evidence Bags (DEBs) are a mechanism for bundling digital evidence, associated metadata and audit logs into a single structure. DEB-compliant applications can update a DEB's audit log as evidence is introduced into the bag and as data in the bag is processed. This paper investigates native file system support for DEBs, which has a number of benefits over ad hoc modification of digital evidence bags. The paper also describes an API for DEB-enabled applications and methods for providing DEB access to legacy applications through a DEB-aware file system. The paper addresses an urgent need for digital-forensics-aware operating system components that can enhance the consistency, security and performance of investigations.

  6. Electronic Document Management Using Inverted Files System

    NASA Astrophysics Data System (ADS)

    Suhartono, Derwin; Setiawan, Erwin; Irwanto, Djon

    2014-03-01

    The amount of documents increases so fast. Those documents exist not only in a paper based but also in an electronic based. It can be seen from the data sample taken by the SpringerLink publisher in 2010, which showed an increase in the number of digital document collections from 2003 to mid of 2010. Then, how to manage them well becomes an important need. This paper describes a new method in managing documents called as inverted files system. Related with the electronic based document, the inverted files system will closely used in term of its usage to document so that it can be searched over the Internet using the Search Engine. It can improve document search mechanism and document save mechanism.

  7. A History of the Andrew File System

    SciTech Connect

    2011-02-22

    Derrick Brashear and Jeffrey Altman will present a technical history of the evolution of Andrew File System starting with the early days of the Andrew Project at Carnegie Mellon through the commercialization by Transarc Corporation and IBM and a decade of OpenAFS. The talk will be technical with a focus on the various decisions and implementation trade-offs that were made over the course of AFS versions 1 through 4, the development of the Distributed Computing Environment Distributed File System (DCE DFS), and the course of the OpenAFS development community. The speakers will also discuss the various AFS branches developed at the University of Michigan, Massachusetts Institute of Technology and Carnegie Mellon University.

  8. 20 CFR 429.202 - How do I file a claim under this subpart?

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... FEDERAL TORT CLAIMS ACT AND RELATED STATUTES Claims Under the Military Personnel and Civilian Employees... files the claim, the order of precedence for filing is spouse, child, parent, sibling. (2) You may...

  9. 20 CFR 429.202 - How do I file a claim under this subpart?

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... FEDERAL TORT CLAIMS ACT AND RELATED STATUTES Claims Under the Military Personnel and Civilian Employees... files the claim, the order of precedence for filing is spouse, child, parent, sibling. (2) You may...

  10. 20 CFR 429.202 - How do I file a claim under this subpart?

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... FEDERAL TORT CLAIMS ACT AND RELATED STATUTES Claims Under the Military Personnel and Civilian Employees... files the claim, the order of precedence for filing is spouse, child, parent, sibling. (2) You may...

  11. 75 FR 37430 - American Transmission Systems, Inc.; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-29

    ... Federal Energy Regulatory Commission American Transmission Systems, Inc.; Notice of Filing June 21, 2010. Take notice that on February 16, 2010, American Transmission Systems, Inc. filed a compliance filing... 17, 2009 Order Addressing RTO Realignment Request and Complaint, American Transmission Sys.,...

  12. Design and Implementation of a Metadata-rich File System

    SciTech Connect

    Ames, S; Gokhale, M B; Maltzahn, C

    2010-01-19

    Despite continual improvements in the performance and reliability of large scale file systems, the management of user-defined file system metadata has changed little in the past decade. The mismatch between the size and complexity of large scale data stores and their ability to organize and query their metadata has led to a de facto standard in which raw data is stored in traditional file systems, while related, application-specific metadata is stored in relational databases. This separation of data and semantic metadata requires considerable effort to maintain consistency and can result in complex, slow, and inflexible system operation. To address these problems, we have developed the Quasar File System (QFS), a metadata-rich file system in which files, user-defined attributes, and file relationships are all first class objects. In contrast to hierarchical file systems and relational databases, QFS defines a graph data model composed of files and their relationships. QFS incorporates Quasar, an XPATH-extended query language for searching the file system. Results from our QFS prototype show the effectiveness of this approach. Compared to the de facto standard, the QFS prototype shows superior ingest performance and comparable query performance on user metadata-intensive operations and superior performance on normal file metadata operations.

  13. Digital Libraries: The Next Generation in File System Technology.

    ERIC Educational Resources Information Center

    Bowman, Mic; Camargo, Bill

    1998-01-01

    Examines file sharing within corporations that use wide-area, distributed file systems. Applications and user interactions strongly suggest that the addition of services typically associated with digital libraries (content-based file location, strongly typed objects, representation of complex relationships between documents, and extrinsic…

  14. 76 FR 43206 - Electronic Tariff Filing System (ETFS)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-20

    ...In this document, the Federal Communications Commission (Commission) adopts rule revisions enabling all tariff filers to file tariffs electronically over the Internet, using the Electronic Tariff Filing System (ETFS). Additionally, the Commission clarifies and makes more consistent certain technical rules related to tariff filings. The Commission concludes that it is appropriate to apply the......

  15. Active Storage Processing in a Parallel File System

    SciTech Connect

    Felix, Evan J.; Fox, Kevin M.; Regimbal, Kevin M.; Nieplocha, Jarek

    2006-01-01

    By creating a processing system within a parallel file system one can harness the power of unused processing power on servers that have very fast access to the disks they are serving. By inserting a module the Lustre file system the Active Storage Concept is able to perform processing with the file system architecture. Results of using this technology are presented as the results of the Supercomputing StorCloud Challenge Application are reviewed.

  16. RAMA: A file system for massively parallel computers

    NASA Technical Reports Server (NTRS)

    Miller, Ethan L.; Katz, Randy H.

    1993-01-01

    This paper describes a file system design for massively parallel computers which makes very efficient use of a few disks per processor. This overcomes the traditional I/O bottleneck of massively parallel machines by storing the data on disks within the high-speed interconnection network. In addition, the file system, called RAMA, requires little inter-node synchronization, removing another common bottleneck in parallel processor file systems. Support for a large tertiary storage system can easily be integrated in lo the file system; in fact, RAMA runs most efficiently when tertiary storage is used.

  17. Optimizing Input/Output Using Adaptive File System Policies

    NASA Technical Reports Server (NTRS)

    Madhyastha, Tara M.; Elford, Christopher L.; Reed, Daniel A.

    1996-01-01

    Parallel input/output characterization studies and experiments with flexible resource management algorithms indicate that adaptivity is crucial to file system performance. In this paper we propose an automatic technique for selecting and refining file system policies based on application access patterns and execution environment. An automatic classification framework allows the file system to select appropriate caching and pre-fetching policies, while performance sensors provide feedback used to tune policy parameters for specific system environments. To illustrate the potential performance improvements possible using adaptive file system policies, we present results from experiments involving classification-based and performance-based steering.

  18. 19 CFR 191.176 - Procedures for claims filed under 19 U.S.C. 1313(p).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 2 2013-04-01 2013-04-01 false Procedures for claims filed under 19 U.S.C. 1313(p... § 191.176 Procedures for claims filed under 19 U.S.C. 1313(p). (a) Applicability. The general procedures for filing drawback claims shall be applicable to claims filed under 19 U.S.C. 1313(p)...

  19. 19 CFR 191.176 - Procedures for claims filed under 19 U.S.C. 1313(p).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Procedures for claims filed under 19 U.S.C. 1313(p... § 191.176 Procedures for claims filed under 19 U.S.C. 1313(p). (a) Applicability. The general procedures for filing drawback claims shall be applicable to claims filed under 19 U.S.C. 1313(p)...

  20. 19 CFR 191.176 - Procedures for claims filed under 19 U.S.C. 1313(p).

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 2 2011-04-01 2011-04-01 false Procedures for claims filed under 19 U.S.C. 1313(p... § 191.176 Procedures for claims filed under 19 U.S.C. 1313(p). (a) Applicability. The general procedures for filing drawback claims shall be applicable to claims filed under 19 U.S.C. 1313(p)...

  1. Silvabase: A flexible data file management system

    NASA Technical Reports Server (NTRS)

    Lambing, Steven J.; Reynolds, Sandra J.

    1991-01-01

    The need for a more flexible and efficient data file management system for mission planning in the Mission Operations Laboratory (EO) at MSFC has spawned the development of Silvabase. Silvabase is a new data file structure based on a B+ tree data structure. This data organization allows for efficient forward and backward sequential reads, random searches, and appends to existing data. It also provides random insertions and deletions with reasonable efficiency, utilization of storage space well but not at the expense of speed, and performance of these functions on a large volume of data. Mission planners required that some data be keyed and manipulated in ways not found in a commercial product. Mission planning software is currently being converted to use Silvabase in the Spacelab and Space Station Mission Planning Systems. Silvabase runs on a Digital Equipment Corporation's popular VAX/VMS computers in VAX Fortran. Silvabase has unique features involving time histories and intervals such as in operations research. Because of its flexibility and unique capabilities, Silvabase could be used in almost any government or commercial application that requires efficient reads, searches, and appends in medium to large amounts of almost any kind of data.

  2. pcircle - A Suite of Scalable Parallel File System Tools

    SciTech Connect

    WANG, FEIYI

    2015-10-01

    Most of the software related to file system are written for conventional local file system, they are serialized and can't take advantage of the benefit of a large scale parallel file system. "pcircle" software builds on top of ubiquitous MPI in cluster computing environment and "work-stealing" pattern to provide a scalable, high-performance suite of file system tools. In particular - it implemented parallel data copy and parallel data checksumming, with advanced features such as async progress report, checkpoint and restart, as well as integrity checking.

  3. pcircle - A Suite of Scalable Parallel File System Tools

    Energy Science and Technology Software Center (ESTSC)

    2015-10-01

    Most of the software related to file system are written for conventional local file system, they are serialized and can't take advantage of the benefit of a large scale parallel file system. "pcircle" software builds on top of ubiquitous MPI in cluster computing environment and "work-stealing" pattern to provide a scalable, high-performance suite of file system tools. In particular - it implemented parallel data copy and parallel data checksumming, with advanced features such as asyncmore » progress report, checkpoint and restart, as well as integrity checking.« less

  4. Holographic system for filing and retrieving patents.

    PubMed

    Sugaya, T; Ishikawa, M; Hoshino, I; Iwamoto, A

    1981-09-15

    A large-capacity high-speed holographic system has been developed for filing and retrieving the patent literature. This machine can store 280,000 pages of the Japanese patents journal (or the U.S. Official Gazette) and any one page can be retrieved within 1 sec. A high-resolution TV camera with 2110 scanning lines and a CRT display terminal with 1055 scanning lines were also developed to clearly represent fine drawings and letters in the patents. The system developed is equipped with a momentary 2.6-Mbyte electric one-frame memory for scanning mode conversion. Any image on the CRT can be printed out on a plain sheet of paper with a laser beam printer. PMID:20333108

  5. INFeRS: Interactive Numeric Files Retrieval System. Final Report.

    ERIC Educational Resources Information Center

    Chiang, Katherine; And Others

    In 1988 Mann Library at Cornell University proposed to develop a computer system that would support interactive access to significant electronic files in agriculture and the life sciences. This system was titled the Interactive Numeric Files Retrieval System (INFeRS). This report describes how project goals were met and it presents the project's…

  6. An Anatomic Pathology System Using the File Manager

    PubMed Central

    Ginsburg, R. E.; Tatarczuk, J. R.; Roy, G. R.

    1981-01-01

    An Anatomic Pathology System incorporating patient data from surgical pathology, cytopathology and autopsy pathology is presented. The System includes four interconnected files created with the aid of the File Manager. One file, containing patient demographic data, can be used as a connecting node to other patient databases. Five MUMPS routines, using File Manager functions, allow System users unfamiliar with computers and computer programming to easily enter, edit and retrieve patient information. Retrieved information is in a format to reconstruct, when possible, a patient's medical history from the pathology database and to correlate surgical pathology, cytopathology and autopsy pathology data.

  7. Distributing LHC application software and conditions databases using the CernVM file system

    NASA Astrophysics Data System (ADS)

    Blomer, Jakob; Aguado-Sánchez, Carlos; Buncic, Predrag; Harutyunyan, Artem

    2011-12-01

    The CernVM File System (CernVM-FS) is a read-only file system designed to deliver high energy physics (HEP) experiment analysis software onto virtual machines and Grid worker nodes in a fast, scalable, and reliable way. CernVM-FS decouples the underlying operating system from the experiment denned software stack. Files and file metadata are aggressively cached and downloaded on demand. By designing the file system specifically to the use case of HEP software repositories and experiment conditions data, several typically hard problems for (distributed) file systems can be solved in an elegant way. For the distribution of files, we use a standard HTTP transport, which allows exploitation of a variety of web caches, including commercial content delivery networks. We ensure data authenticity and integrity over possibly untrusted caches and connections while keeping all distributed data cacheable. On the small scale, we developed an experimental extension that allows multiple CernVM-FS instances in a computing cluster to discover each other and to share their file caches.

  8. Architecture For An Image Filing And Indexing System

    NASA Astrophysics Data System (ADS)

    Hack, Stanley N.; Paoni, Robert A.; Robeson, Glenn H.

    1986-06-01

    We are developing an in-house Picture Archiving and Communication System (PACS) targeted to the centralized storage of images acquired from our computer-assisted imaging modalities and to the display of these images on multi-modality viewing stations. The central image database is distributed between two system modules with image processing capabilities located at the viewing stations. The first module of the image database is an image filing subsystem used for the storage and retrieval of complete image files. In our initial work, this module consists of a Data General MV/6000 computer system with 1.16 Gbytes of on-line disk storage. However, more efficient dedicated filing systems may be substituted for this general purpose computer in future revisions. The second module is an image file indexing subsystem which has been implemented on a DEC PDP-11/44 computer and is tightly integrated with our MARS II (ADAC Laboratories) Radiology Information System. These two image database modules communicate via low-speed, serial communications lines. This report focuses on our developmental work on the image file indexing subsystem and its communications protocol with the image filing subsystem. The image file indexing subsystem automatically inserts image file locators for studies referenced by patient when an image is transmitted from the acquisition device (eg, CT) to the image filing subsystem. It also locates image files at the request of a viewing station user based on patient name, physician name, or study type for either read or unread studies. Other capabilities include cross-referencing patient attributes with the MARS II system, deleting studies based on predefined criteria, storing requests for hard copy, storing user selected image processing attributes for individual images, flagging the archival status of an image, and complete managerial functions. This central-ized image filing and indexing system comprises what will become the central element of our PACS.

  9. Comparison of leading parallel NAS file systems on commodity hardware

    SciTech Connect

    Hedges, R; Fitzgerald, K; Gary, M; Stearman, D M

    2010-11-08

    High performance computing has experienced tremendous gains in system performance over the past 20 years. Unfortunately other system capabilities, such as file I/O, have not grown commensurately. In this activity, we present the results of our tests of two leading file systems (GPFS and Lustre) on the same physical hardware. This hardware is the standard commodity storage solution in use at LLNL and, while much smaller in size, is intended to enable us to learn about differences between the two systems in terms of performance, ease of use and resilience. This work represents the first hardware consistent study of the two leading file systems that the authors are aware of.

  10. Using the Sirocco File System for high-bandwidth checkpoints.

    SciTech Connect

    Klundt, Ruth Ann; Curry, Matthew L.; Ward, H. Lee

    2012-02-01

    The Sirocco File System, a file system for exascale under active development, is designed to allow the storage software to maximize quality of service through increased flexibility and local decision-making. By allowing the storage system to manage a range of storage targets that have varying speeds and capacities, the system can increase the speed and surety of storage to the application. We instrument CTH to use a group of RAM-based Sirocco storage servers allocated within the job as a high-performance storage tier to accept checkpoints, allowing computation to potentially continue asynchronously of checkpoint migration to slower, more permanent storage. The result is a 10-60x speedup in constructing and moving checkpoint data from the compute nodes. This demonstration of early Sirocco functionality shows a significant benefit for a real I/O workload, checkpointing, in a real application, CTH. By running Sirocco storage servers within a job as RAM-only stores, CTH was able to store checkpoints 10-60x faster than storing to PanFS, allowing the job to continue computing sooner. While this prototype did not include automatic data migration, the checkpoint was available to be pushed or pulled to disk-based storage as needed after the compute nodes continued computing. Future developments include the ability to dynamically spawn Sirocco nodes to absorb checkpoints, expanding this mechanism to other fast tiers of storage like flash memory, and sharing of dynamic Sirocco nodes between multiple jobs as needed.

  11. 20 CFR 429.202 - How do I file a claim under this subpart?

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ....202 Section 429.202 Employees' Benefits SOCIAL SECURITY ADMINISTRATION ADMINISTRATIVE CLAIMS UNDER THE... file. You must file your claim with the Social Security Administration, Office of the General Counsel... responsible for proving ownership or possession, the facts surrounding the loss or damage, and the value...

  12. Dynamic Non-Hierarchical File Systems for Exascale Storage

    SciTech Connect

    Long, Darrell E.; Miller, Ethan L

    2015-02-24

    This constitutes the final report for “Dynamic Non-Hierarchical File Systems for Exascale Storage”. The ultimate goal of this project was to improve data management in scientific computing and high-end computing (HEC) applications, and to achieve this goal we proposed: to develop the first, HEC-targeted, file system featuring rich metadata and provenance collection, extreme scalability, and future storage hardware integration as core design goals, and to evaluate and develop a flexible non-hierarchical file system interface suitable for providing more powerful and intuitive data management interfaces to HEC and scientific computing users. Data management is swiftly becoming a serious problem in the scientific community – while copious amounts of data are good for obtaining results, finding the right data is often daunting and sometimes impossible. Scientists participating in a Department of Energy workshop noted that most of their time was spent “...finding, processing, organizing, and moving data and it’s going to get much worse”. Scientists should not be forced to become data mining experts in order to retrieve the data they want, nor should they be expected to remember the naming convention they used several years ago for a set of experiments they now wish to revisit. Ideally, locating the data you need would be as easy as browsing the web. Unfortunately, existing data management approaches are usually based on hierarchical naming, a 40 year-old technology designed to manage thousands of files, not exabytes of data. Today’s systems do not take advantage of the rich array of metadata that current high-end computing (HEC) file systems can gather, including content-based metadata and provenance1 information. As a result, current metadata search approaches are typically ad hoc and often work by providing a parallel management system to the “main” file system, as is done in Linux (the locate utility), personal computers, and enterprise search

  13. Configuration Management File Manager Developed for Numerical Propulsion System Simulation

    NASA Technical Reports Server (NTRS)

    Follen, Gregory J.

    1997-01-01

    One of the objectives of the High Performance Computing and Communication Project's (HPCCP) Numerical Propulsion System Simulation (NPSS) is to provide a common and consistent way to manage applications, data, and engine simulations. The NPSS Configuration Management (CM) File Manager integrated with the Common Desktop Environment (CDE) window management system provides a common look and feel for the configuration management of data, applications, and engine simulations for U.S. engine companies. In addition, CM File Manager provides tools to manage a simulation. Features include managing input files, output files, textual notes, and any other material normally associated with simulation. The CM File Manager includes a generic configuration management Application Program Interface (API) that can be adapted for the configuration management repositories of any U.S. engine company.

  14. High-Performance, Multi-Node File Copies and Checksums for Clustered File Systems

    NASA Technical Reports Server (NTRS)

    Kolano, Paul Z.; Ciotti, Robert B.

    2012-01-01

    Modern parallel file systems achieve high performance using a variety of techniques, such as striping files across multiple disks to increase aggregate I/O bandwidth and spreading disks across multiple servers to increase aggregate interconnect bandwidth. To achieve peak performance from such systems, it is typically necessary to utilize multiple concurrent readers/writers from multiple systems to overcome various singlesystem limitations, such as number of processors and network bandwidth. The standard cp and md5sum tools of GNU coreutils found on every modern Unix/Linux system, however, utilize a single execution thread on a single CPU core of a single system, and hence cannot take full advantage of the increased performance of clustered file systems. Mcp and msum are drop-in replacements for the standard cp and md5sum programs that utilize multiple types of parallelism and other optimizations to achieve maximum copy and checksum performance on clustered file systems. Multi-threading is used to ensure that nodes are kept as busy as possible. Read/write parallelism allows individual operations of a single copy to be overlapped using asynchronous I/O. Multinode cooperation allows different nodes to take part in the same copy/checksum. Split-file processing allows multiple threads to operate concurrently on the same file. Finally, hash trees allow inherently serial checksums to be performed in parallel. Mcp and msum provide significant performance improvements over standard cp and md5sum using multiple types of parallelism and other optimizations. The total speed-ups from all improvements are significant. Mcp improves cp performance over 27x, msum improves md5sum performance almost 19x, and the combination of mcp and msum improves verified copies via cp and md5sum by almost 22x. These improvements come in the form of drop-in replacements for cp and md5sum, so are easily used and are available for download as open source software at http://mutil.sourceforge.net.

  15. Modular file-structured databasing system. [SADIST-SLINK

    SciTech Connect

    Mathey, E.L.; Stauffer, J.D.

    1980-01-01

    Computer aids for integrated circuit design require the manipulation of vast amounts of data. The SADIST-SLINK modular file-structured databasing system consists of a databasing primitive written in FORTRAN and a powerful surround program written in PASCAL. The modular approach is simple, cost-effective, and extremely efficient. While the system was designed to handle LSI circuit data, it is generalized and meets many needs. In addition to circuit library information, the database currently contains HELP and DOCUMENTATION files, as well as runstream files that provide operating data for a Design Executive Program. 1 figure. (RWR)

  16. Educational Use of Toshiba TDF-500 Medical Image Filing System for Teaching File Archiving and Viewing

    NASA Astrophysics Data System (ADS)

    Kimura, Michio; Yashiro, Naobumi; Kita, Koichi; Tani, Yuichiro; IIO, Masahiro

    1989-05-01

    The authors have been using medical image filing system TOSHIBA TDIS-FILE as a teaching files archiving and viewing at University of Tokyo, Hospital, Department of Radiology. Image display on CRT was proven sufficient for the purpose of education for small groups of students, as well as residents. However, retrieval time for archived images, man-machine interface, and financial expenses are not in a satisfactory level yet. The authors also implemented flexible retrieval scheme for diagnostic codes, which has been proven sophisticated. These kinds of software utilities, as well as hardware evolution, are essential for this kind of instruments to be used as potential component of PACSystem. In our department, PACS project is being carried on. In the system, TOSHIBA AS3160 workstation (=SUN 3/160) handles all user interfaces including controls of medical image displays, examination data bases, and interface with HIS.

  17. 75 FR 39243 - California Independent System; Operator Corporation; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-08

    ... using the ``eFiling'' link at http://www.ferc.gov . Persons unable to file electronically should submit... Energy Regulatory Commission California Independent System; Operator Corporation; Notice of Filing June... protest this filing must file in accordance with Rules 211 and 214 of the Commission's Rules of...

  18. 20 CFR 429.202 - How do I file a claim under this subpart?

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 2 2013-04-01 2013-04-01 false How do I file a claim under this subpart? 429.202 Section 429.202 Employees' Benefits SOCIAL SECURITY ADMINISTRATION ADMINISTRATIVE CLAIMS UNDER THE FEDERAL TORT CLAIMS ACT AND RELATED STATUTES Claims Under the Military Personnel and Civilian Employees' Claims Act of 1964 § 429.202 How do...

  19. 76 FR 70651 - Fee for Filing a Patent Application Other Than by the Electronic Filing System

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-15

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF COMMERCE... the Electronic Filing System AGENCY: United States Patent and Trademark Office, Commerce. ACTION... of $400 shall be established for each application for an original (i.e., non-reissue) patent,...

  20. JavaFIRE: A Replica and File System for Grids

    NASA Astrophysics Data System (ADS)

    Petek, Marko; da Silva Gomes, Diego; Resin Geyer, Claudio Fernando; Santoro, Alberto; Gowdy, Stephen

    2012-12-01

    The work is focused on the creation of a replica and file transfers system for Computational Grids inspired on the needs of the High Energy Physics (HEP). Due to the high volume of data created by the HEP experiments, an efficient file and dataset replica system may play an important role on the computing model. Data replica systems allow the creation of copies, distributed between the different storage elements on the Grid. In the HEP context, the data files are basically immutable. This eases the task of the replica system, because given sufficient local storage resources any dataset just needs to be replicated to a particular site once. Concurrent with the advent of computational Grids, another important theme in the distributed systems area that has also seen some significant interest is that of peer-to-peer networks (p2p). P2p networks are an important and evolving mechanism that eases the use of distributed computing and storage resources by end users. One common technique to achieve faster file download from possibly overloaded storage elements over congested networks is to split the files into smaller pieces. This way, each piece can be transferred from a different replica, in parallel or not, optimizing the moments when the network conditions are better suited to the transfer. The main tasks achieved by the system are: the creation of replicas, the development of a system for replicas transfer (RFT) and for replicas location (RLS) with a different architecture that the one provided by Globus and the development of a system for file transfer in pieces on computational grids with interfaces for several storage elements. The RLS uses a p2p overlay based on the Kademlia algorithm.

  1. Storing files in a parallel computing system based on user-specified parser function

    DOEpatents

    Faibish, Sorin; Bent, John M; Tzelnic, Percy; Grider, Gary; Manzanares, Adam; Torres, Aaron

    2014-10-21

    Techniques are provided for storing files in a parallel computing system based on a user-specified parser function. A plurality of files generated by a distributed application in a parallel computing system are stored by obtaining a parser from the distributed application for processing the plurality of files prior to storage; and storing one or more of the plurality of files in one or more storage nodes of the parallel computing system based on the processing by the parser. The plurality of files comprise one or more of a plurality of complete files and a plurality of sub-files. The parser can optionally store only those files that satisfy one or more semantic requirements of the parser. The parser can also extract metadata from one or more of the files and the extracted metadata can be stored with one or more of the plurality of files and used for searching for files.

  2. Generalized File Management System or Proto-DBMS?

    ERIC Educational Resources Information Center

    Braniff, Tom

    1979-01-01

    The use of a data base management system (DBMS) as opposed to traditional data processing is discussed. The generalized file concept is viewed as an entry level step to the DBMS. The transition process from one system to the other is detailed. (SF)

  3. The Spider Center Wide File System; From Concept to Reality

    SciTech Connect

    Shipman, Galen M; Dillow, David A; Oral, H Sarp; Wang, Feiyi

    2009-01-01

    The Leadership Computing Facility (LCF) at Oak Ridge National Laboratory (ORNL) has a diverse portfolio of computational resources ranging from a petascale XT4/XT5 simulation system (Jaguar) to numerous other systems supporting development, visualization, and data analytics. In order to support vastly different I/O needs of these systems Spider, a Lustre-based center wide file system was designed and deployed to provide over 240 GB/s of aggregate throughput with over 10 Petabytes of formatted capacity. A multi-stage InfiniBand network, dubbed as Scalable I/O Network (SION), with over 889 GB/s of bisectional bandwidth was deployed as part of Spider to provide connectivity to our simulation, development, visualization, and other platforms. To our knowledge, while writing this paper, Spider is the largest and fastest POSIX-compliant parallel file system in production. This paper will detail the overall architecture of the Spider system, challenges in deploying and initial testings of a file system of this scale, and novel solutions to these challenges which offer key insights into file system design in the future.

  4. TOXICS RELEASE INVENTORY - GEOGRAPHIC INFORMATION SYSTEM COVERAGE FILES

    EPA Science Inventory

    Data extracted from the EPA Toxics Release Inventory (TRI) system for reporting year 1993 are written in Arc/INFO geographic information system (GIS) export file format (an ASCII data exchange format). The data are also summarized in tables out of the TRI public data release publ...

  5. File-System Workload on a Scientific Multiprocessor

    NASA Technical Reports Server (NTRS)

    Kotz, David; Nieuwejaar, Nils

    1995-01-01

    Many scientific applications have intense computational and I/O requirements. Although multiprocessors have permitted astounding increases in computational performance, the formidable I/O needs of these applications cannot be met by current multiprocessors a their I/O subsystems. To prevent I/O subsystems from forever bottlenecking multiprocessors and limiting the range of feasible applications, new I/O subsystems must be designed. The successful design of computer systems (both hardware and software) depends on a thorough understanding of their intended use. A system designer optimizes the policies and mechanisms for the cases expected to most common in the user's workload. In the case of multiprocessor file systems, however, designers have been forced to build file systems based only on speculation about how they would be used, extrapolating from file-system characterizations of general-purpose workloads on uniprocessor and distributed systems or scientific workloads on vector supercomputers (see sidebar on related work). To help these system designers, in June 1993 we began the Charisma Project, so named because the project sought to characterize 1/0 in scientific multiprocessor applications from a variety of production parallel computing platforms and sites. The Charisma project is unique in recording individual read and write requests-in live, multiprogramming, parallel workloads (rather than from selected or nonparallel applications). In this article, we present the first results from the project: a characterization of the file-system workload an iPSC/860 multiprocessor running production, parallel scientific applications at NASA's Ames Research Center.

  6. Program Description: Financial Master File Processor-SWRL Financial System.

    ERIC Educational Resources Information Center

    Ideda, Masumi

    Computer routines designed to produce various management and accounting reports required by the Southwest Regional Laboratory's (SWRL) Financial System are described. Input data requirements and output report formats are presented together with a discussion of the Financial Master File updating capabilities of the system. This document should be…

  7. Deploying Server-side File System Monitoring at NERSC

    SciTech Connect

    Uselton, Andrew

    2009-05-01

    The Franklin Cray XT4 at the NERSC center was equipped with the server-side I/O monitoring infrastructure Cerebro/LMT, which is described here in detail. Insights gained from the data produced include a better understanding of instantaneous data rates during file system testing, file system behavior during regular production time, and long-term average behaviors. Information and insights gleaned from this monitoring support efforts to proactively manage the I/O infrastructure on Franklin. A simple model for I/O transactions is introduced and compared with the 250 million observations sent to the LMT database from August 2008 to February 2009.

  8. An Improved B+ Tree for Flash File Systems

    NASA Astrophysics Data System (ADS)

    Havasi, Ferenc

    Nowadays mobile devices such as mobile phones, mp3 players and PDAs are becoming evermore common. Most of them use flash chips as storage. To store data efficiently on flash, it is necessary to adapt ordinary file systems because they are designed for use on hard disks. Most of the file systems use some kind of search tree to store index information, which is very important from a performance aspect. Here we improved the B+ search tree algorithm so as to make flash devices more efficient. Our implementation of this solution saves 98%-99% of the flash operations, and is now the part of the Linux kernel.

  9. Dealing with the data deluge: file systems and storage technologies

    NASA Astrophysics Data System (ADS)

    Denson, David H.

    2012-06-01

    As defense and intelligence agencies seek to use the increasing amount of available data to make mission critical decisions on the battlefield, there is heavy emphasis on smart data and imagery collection: the capture, storage, and analysis necessary to drive real-time intelligence. This reality leads to an inevitable challenge-warfighters are increasingly swimming in sensors and drowning in data. With the millions, if not billions, of sensors in place that provide all-seeing reports of the combat environment, managing and tackling the overload is critical. This session highlights the capabilities of file systems and storage technologies that can interactively manage 100M+ files and 1PB+ single directory file systems.

  10. Correlations in Single File Diffusion: Open and Closed Systems

    NASA Astrophysics Data System (ADS)

    Tripathi, Ashwani Kr.; Kumar, Deepak

    2014-07-01

    We present a discussion of positional and velocity correlations of particles in single-file diffusion, based on some earlier work. We consider two physical situations: (a) An open system of N hard-core particles on an infinite line. (b) A large system with a fixed density of hard-core particles at an arbitrary temperature. In the first case (a), moments and correlations show unusual behavior. The average displacement of a particle is nonzero and grows as t1/2. Furthermore it depends on the position of the particle. Particles on the right of center are pushed right and those on the left are pushed left. The mean-square displacement also depends on the position. The diffusion constant is small for particles around the center but grows rapidly toward edges. Certain correlations in particle displacement grow with separation. For the second case (b) we give exact results for velocity-velocity auto-correlator of a tagged particle and establish that with time this correlator becomes negative and approaches zero as a power-law t-3/2 at long times. The mobility of the tagged particle is shown to decrease rapidly with density as has been observed in experiments. Special Issue Comments: This article presents mathematical results on the dynamics in expanding files, and constant density files. This article is connected to the Special Issue articles about advanced statistical properties in single file dynamics29 and files with force and advanced formulations.30

  11. Cleaning capacity of hybrid instrumentation technique using reamer with alternating cutting edges system files: Histological analysis

    PubMed Central

    Júnior, Emilio Carlos Sponchiado; da Fonseca, Tiago Silva; da Frota, Matheus Franco; de Carvalho, Fredson Marcio Acris; Marques, André Augusto Franco; Garcia, Lucas da Fonseca Roberti

    2014-01-01

    Aim: The aim of the following study is to evaluate the cleaning capacity of a hybrid instrumentation technique using Reamer with Alternating Cutting Edges (RaCe) system files in the apical third of mesial roots of mandibular molars. Materials and Methods: Twenty teeth were selected and separated into two groups (n = 20) according to instrumentation technique as follows: BioRaCe - chemomechanical preparation with K-type files #10 and #15; and files BioRaCe BR0, BR1, BR2, BR3, and BR4; HybTec - hybrid instrumentation technique with K-type files #10 and #15 in the working length, #20 at 2 mm, #25 at 3 mm, cervical preparation with Largo burs #1 and #2; apical preparation with K-type files #15, #20, and #25 and RaCe files #25.04 and #30.04. The root canals were irrigated with 1 ml of 2.5% sodium hypochlorite at each change of instrument. The specimens were histologically processed and photographed under light optical microscope. The images were inserted onto an integration grid to count the amount of debris present in the root canal. Results: BioRaCe presented the highest percentage of debris in the apical third, however, with no statistically significant difference for HybTec (P > 0.05). Conclusions: The hybrid technique presented similar cleaning capacity as the technique recommended by the manufacturer. PMID:24963247

  12. 77 FR 56839 - California Independent System Operator Corporation; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-14

    ... notice that on July 9, 2012, California Independent System Operator Corporation submitted their compliance filing in response to the Federal Energy Regulatory Commission's (Commission) June 8, 2012 Order... Filing, 139 FERC ] 61,198 (2012). Any person desiring to intervene or to protest this filing must file...

  13. 76 FR 61956 - Electronic Tariff Filing System (ETFS)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-06

    ... published at 47 CFR in parts 61 and 64 published at 76 FR 43206, July 20, 2011, are effective November 17... requirements contained in the Commission's Order, FCC 11-92, published at 76 FR 43206, July 20, 2011. The OMB... COMMISSION 47 CFR Parts 61 and 64 Electronic Tariff Filing System (ETFS) AGENCY: Federal...

  14. The secret stridulatory file under the right tegmen in katydids (Orthoptera, Ensifera, Tettigonioidea).

    PubMed

    Chamorro-Rengifo, Juliana; Braun, Holger; Lopes-Andrade, Cristiano

    2014-01-01

    Males of most species of crickets and katydids produce species-specific calling songs to attract conspecific females. The typical stridulatory apparatus of the Ensifera consists of a file-and-scraper system in the basal dorsal region of the forewings (tegmina): the file on the underside of the cubital vein of one tegmen is composed of a series of lamelliform teeth and is run against the sclerotized scraper at the edge of the other tegmen. The region directly distal of the cubital vein is often thin and glassy and serves to amplify and spread the sound. In stridulating crickets the tegmina are quite symmetrical with both the left and the right one containing a file, which is considered the ancestral condition (Béthoux 2012). Most of these crickets adopted a right-over-left wing overlap and use only the right file. The few extant species of the ancient group Hagloidea have bilaterally symmetrical tegmina, both with functional files, and individual males can change the overlap (Morris & Gwynne 1978). Katydids are distinguished by a left-over-right wing overlap, with a stridulatory file on the underside of the left tegmen, and a scraper on the right one, which usually is also equipped with a mirror as resonating structure. PMID:24989770

  15. 47 CFR 4.2 - Availability of reports filed under this part.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the procedures set forth in 47 CFR § 0.461. Notice of any requests for inspection of outage reports will be provided pursuant to 47 CFR 0.461(d)(3). Reporting Requirements for Disruptions to... 47 Telecommunication 1 2010-10-01 2010-10-01 false Availability of reports filed under this...

  16. 43 CFR 45.70 - How must documents be filed and served under this subpart?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false How must documents be filed and served under this subpart? 45.70 Section 45.70 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES Alternatives Process § 45.70 How must documents...

  17. 43 CFR 45.70 - How must documents be filed and served under this subpart?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 1 2012-10-01 2011-10-01 true How must documents be filed and served under this subpart? 45.70 Section 45.70 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES Alternatives Process § 45.70 How must documents...

  18. 43 CFR 45.70 - How must documents be filed and served under this subpart?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 1 2011-10-01 2011-10-01 false How must documents be filed and served under this subpart? 45.70 Section 45.70 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES Alternatives Process § 45.70 How must documents...

  19. 43 CFR 45.70 - How must documents be filed and served under this subpart?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 1 2014-10-01 2014-10-01 false How must documents be filed and served under this subpart? 45.70 Section 45.70 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES Alternatives Process § 45.70 How must documents...

  20. 43 CFR 45.70 - How must documents be filed and served under this subpart?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 1 2013-10-01 2013-10-01 false How must documents be filed and served under this subpart? 45.70 Section 45.70 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES Alternatives Process § 45.70 How must documents...

  1. NASIS data base management system: IBM 360 TSS implementation. Volume 6: NASIS message file

    NASA Technical Reports Server (NTRS)

    1973-01-01

    The message file for the NASA Aerospace Safety Information System (NASIS) is discussed. The message file contains all the message and term explanations for the system. The data contained in the file can be broken down into three separate sections: (1) global terms, (2) local terms, and (3) system messages. The various terms are defined and their use within the system is explained.

  2. NASIS data base management system - IBM 360/370 OS MVT implementation. 6: NASIS message file

    NASA Technical Reports Server (NTRS)

    1973-01-01

    The message file for the NASA Aerospace Safety Information System (NASIS) is discussed. The message file contains all the message and term explanations for the system. The data contained in the file can be broken down into three separate sections: (1) global terms, (2) local terms, and (3) system messages. The various terms are defined and their use within the system is explained.

  3. Development of a multimedial filing system for an endoscopy unit.

    PubMed

    Grassi, A; Casale, V; Ferro, S

    1994-01-01

    The rapid technological development of biomedical instruments, and of hardware and software systems is giving new opportunities in the management of medical activities. We have developed a multimedial filing system for an Endoscopy Unit which, thanks to its versatility, is also suitable for other medical branches. The system is built on a database, and includes clinical records of patients together with endoscopic pictures and vocal comments for each case. It was developed by using "Microsoft Windows 3.1" programming and is directly connected to the videoendoscopes. The system operates in a "Novell Netware" network. Future fields of interests are reported with regard to: a) image processing procedures that can be applied; b) other types of images that can be stored such as radiological, echographic images, etc.; c) transmission of information and a global multimedial filing system serving the entire hospital; and d) a written report, including the endoscopic images of the disease. PMID:8025303

  4. Generalized File Management Systems: Their Implication for a California Junior College Data Base System.

    ERIC Educational Resources Information Center

    Fedrick, Robert John

    Criteria to use in evaluating data processing efficiency, factors of file and record definitions, convenience of use for non-programmers, report generating capabilities, and customer support for generalized file management systems for use by the California junior colleges are indicated by the author. The purchase of such a system at the state…

  5. Storing files in a parallel computing system based on user or application specification

    DOEpatents

    Faibish, Sorin; Bent, John M.; Nick, Jeffrey M.; Grider, Gary; Torres, Aaron

    2016-03-29

    Techniques are provided for storing files in a parallel computing system based on a user-specification. A plurality of files generated by a distributed application in a parallel computing system are stored by obtaining a specification from the distributed application indicating how the plurality of files should be stored; and storing one or more of the plurality of files in one or more storage nodes of a multi-tier storage system based on the specification. The plurality of files comprise a plurality of complete files and/or a plurality of sub-files. The specification can optionally be processed by a daemon executing on one or more nodes in a multi-tier storage system. The specification indicates how the plurality of files should be stored, for example, identifying one or more storage nodes where the plurality of files should be stored.

  6. Lightweight File System (LWFS) v. 1.0

    Energy Science and Technology Software Center (ESTSC)

    2008-11-19

    The Lightweight File System (LWFS) is a storage system that provides a minimal set of I/O-system functionality required by file system and/or I/O library implementations for massively parallel machines. In particular, the LWFS-core consists of a scalable security model, an efficient data-movement protocol, and a direct interface to object-based storage devices. Higher-level services such as namespace management, consistency semantics, reliability, and so forth are layered on top of the core services to provide application-specific functionalitymore » as needed. The LWFS code contains implementations of the core services and reference implementations of a number of supplemental services for namespace management and transaction support.« less

  7. Lightweight File System (LWFS) v. 1.0

    SciTech Connect

    2008-11-19

    The Lightweight File System (LWFS) is a storage system that provides a minimal set of I/O-system functionality required by file system and/or I/O library implementations for massively parallel machines. In particular, the LWFS-core consists of a scalable security model, an efficient data-movement protocol, and a direct interface to object-based storage devices. Higher-level services such as namespace management, consistency semantics, reliability, and so forth are layered on top of the core services to provide application-specific functionality as needed. The LWFS code contains implementations of the core services and reference implementations of a number of supplemental services for namespace management and transaction support.

  8. 26 CFR 1.6033-6 - Notification requirement for entities not required to file an annual information return under...

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...), shall submit annually, in electronic form, a notification setting forth the items described in paragraph... required to file under § 1.6033-2(a)(2)(i) Form 990-PF, “Return of Private Foundation or Section 4947(a)(1... organizations required to file under § 1.6033-2(a)(2)(i) Form 990, “Return of Organization Exempt From...

  9. 26 CFR 1.6033-6 - Notification requirement for entities not required to file an annual information return under...

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...), shall submit annually, in electronic form, a notification setting forth the items described in paragraph... required to file under § 1.6033-2(a)(2)(i) Form 990-PF, “Return of Private Foundation or Section 4947(a)(1... organizations required to file under § 1.6033-2(a)(2)(i) Form 990, “Return of Organization Exempt From...

  10. 26 CFR 1.6033-6 - Notification requirement for entities not required to file an annual information return under...

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...), shall submit annually, in electronic form, a notification setting forth the items described in paragraph... required to file under § 1.6033-2(a)(2)(i) Form 990-PF, “Return of Private Foundation or Section 4947(a)(1... organizations required to file under § 1.6033-2(a)(2)(i) Form 990, “Return of Organization Exempt From...

  11. 26 CFR 1.6033-6 - Notification requirement for entities not required to file an annual information return under...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... required to file an annual information return under section 6033(a)(1) (taxable years beginning after... TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Information Returns § 1.6033-6 Notification requirement for entities not required to file an annual information return under section 6033(a)(1)...

  12. 26 CFR 1.6033-6 - Notification requirement for entities not required to file an annual information return under...

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... required to file an annual information return under section 6033(a)(1) (taxable years beginning after... TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Information Returns § 1.6033-6 Notification requirement for entities not required to file an annual information return under section...

  13. 28 CFR Appendix A to Part 58 - Guidelines for Reviewing Applications for Compensation and Reimbursement of Expenses Filed Under...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Compensation and Reimbursement of Expenses Filed Under 11 U.S.C. 330 A Appendix A to Part 58 Judicial... 1994 Pt. 58, App. A Appendix A to Part 58—Guidelines for Reviewing Applications for Compensation and Reimbursement of Expenses Filed Under 11 U.S.C. 330 (a) General Information. (1) The Bankruptcy Reform Act...

  14. 37 CFR 1.109 - Effective filing date of a claimed invention under the Leahy-Smith America Invents Act.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2013-07-01 2013-07-01 false Effective filing date of a claimed invention under the Leahy-Smith America Invents Act. 1.109 Section 1.109 Patents, Trademarks, and... a claimed invention under the Leahy-Smith America Invents Act. (a) The effective filing date for...

  15. 37 CFR 1.109 - Effective filing date of a claimed invention under the Leahy-Smith America Invents Act.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2014-07-01 2014-07-01 false Effective filing date of a claimed invention under the Leahy-Smith America Invents Act. 1.109 Section 1.109 Patents, Trademarks, and... a claimed invention under the Leahy-Smith America Invents Act. (a) The effective filing date for...

  16. Sharing lattice QCD data over a widely distributed file system

    NASA Astrophysics Data System (ADS)

    Amagasa, T.; Aoki, S.; Aoki, Y.; Aoyama, T.; Doi, T.; Fukumura, K.; Ishii, N.; Ishikawa, K.-I.; Jitsumoto, H.; Kamano, H.; Konno, Y.; Matsufuru, H.; Mikami, Y.; Miura, K.; Sato, M.; Takeda, S.; Tatebe, O.; Togawa, H.; Ukawa, A.; Ukita, N.; Watanabe, Y.; Yamazaki, T.; Yoshie, T.

    2015-12-01

    JLDG is a data-grid for the lattice QCD (LQCD) community in Japan. Several large research groups in Japan have been working on lattice QCD simulations using supercomputers distributed over distant sites. The JLDG provides such collaborations with an efficient method of data management and sharing. File servers installed on 9 sites are connected to the NII SINET VPN and are bound into a single file system with the GFarm. The file system looks the same from any sites, so that users can do analyses on a supercomputer on a site, using data generated and stored in the JLDG at a different site. We present a brief description of hardware and software of the JLDG, including a recently developed subsystem for cooperating with the HPCI shared storage, and report performance and statistics of the JLDG. As of April 2015, 15 research groups (61 users) store their daily research data of 4.7PB including replica and 68 million files in total. Number of publications for works which used the JLDG is 98. The large number of publications and recent rapid increase of disk usage convince us that the JLDG has grown up into a useful infrastructure for LQCD community in Japan.

  17. Metadata management for CDP in object-based file system

    NASA Astrophysics Data System (ADS)

    Yao, Jie; Cao, Qiang; Huang, Jianzhong

    2009-08-01

    Object-based storage system integrates advantage of both NAS and SAN, can be applied in large-capacity, low-cost and large-scale storage systems which are built from commodity devices. Continuous data protection (CDP) is a methodology that continuously captures or tracks data modifications and stores changes independent of the primary data, enabling recovery points from any point in the past. An efficient file system optimized for CDP is needed to provide CDP feature in object-based storage system. In this thesis, a new metadata management method is present. All necessary meta data information are recorded when changes happened to file system. We have a journal-like data placement algorithm to store these metadata. Secondly, this metadata management method provides both CDP feature and Object-based feature. Two type write operations are analyzed to reduce storage space consumption. Object-based data allocation algorithm can take the advantage of distributed file system to concurrently process CDP operations over storage nodes. Thirdly, history revisions and recovery operations are discussed. Finally, the experiment test result is present and analyzed.

  18. Novel Filing Systems Applicable to an Automated Office: A State-of-the-Art Study.

    ERIC Educational Resources Information Center

    Restorick, F. Mark

    1986-01-01

    Examines novel computer filing systems which have particular application to office information storage and retrieval requirements. A variety of filing systems and their major characteristics are reviewed, ranging from network-based file servers to digital image storage and retrieval systems. Desirable characteristics of a modern electronic office…

  19. Part III: AFS - A Secure Distributed File System

    SciTech Connect

    Wachsmann, A.; /SLAC

    2005-06-29

    AFS is a secure distributed global file system providing location independence, scalability and transparent migration capabilities for data. AFS works across a multitude of Unix and non-Unix operating systems and is used at many large sites in production for many years. AFS still provides unique features that are not available with other distributed file systems even though AFS is almost 20 years old. This age might make it less appealing to some but with IBM making AFS available as open-source in 2000, new interest in use and development was sparked. When talking about AFS, people often mention other file systems as potential alternatives. Coda (http://www.coda.cs.cmu.edu/) with its disconnected mode will always be a research project and never have production quality. Intermezzo (http://www.inter-mezzo.org/) is now in the Linux kernel but not available for any other operating systems. NFSv4 (http://www.nfsv4.org/) which picked up many ideas from AFS and Coda is not mature enough yet to be used in serious production mode. This article presents the rich features of AFS and invites readers to play with it.

  20. Hazardous-Waste Data Management System extract tape. Data file

    SciTech Connect

    Not Available

    1991-03-15

    The file contains data compiled for the Resource Conservation and Recovery Act, using the Hazardous Waste Data Management System (HWDMS) database. Notification of Regulated Waste Activity, EPA Form 8700-12 was used to collect the data. The file was updated with information compiled from the Application for a Hazardous Waste Permit-Part A, EPA form 8700-23. The data includes each facility name, EPA Identification number, addresses, owner and operator information, facility contact name and phone number. The data also indicate whether a facility is a generator, treatment/storer/disposer, and/or transporter of hazardous waste. Also included is a listing of wastes handled, taken from 40CFR Pt. 261, SIC codes, Permit Process Codes, Permit Issuance data, and non-sensitive compliance and enforcement data. Data is included for all Regions and states except for Mississippi, which has already been implemented in RCRIS. PLEASE NOTE: The computer tape product consists of two separate tape files: the Hazardous Waste Data Management System (HWDMS) database, and the Resource Conservation and Recovery Information System (RCRIS) database. RCRIS is replacing HWDMS as the official RCRA notification database. During the first year of RCRIS implementation, both systems will be operational. As a state converts to RCRIS from HWDMS, the HWDMS data for that state is archived; the current plan is to archive all data that is stored in HWDMS by the end of 1991. In order to have a complete record of all RCRA notification data, the User must have both tapes.

  1. 76 FR 71019 - Amendment of Inspector General's Operation and Reporting (IGOR) System Investigative Files (EPA-40)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-16

    ... System: Investigative file information including the names, locations and other personal identifiers of... investigative case file numbers. Safeguards: Computer records are maintained in a secure, password protected computer system. Paper records are maintained in lockable file cabinets. All records are maintained...

  2. The European Southern Observatory-MIDAS table file system

    NASA Technical Reports Server (NTRS)

    Peron, M.; Grosbol, P.

    1992-01-01

    The new and substantially upgraded version of the Table File System in MIDAS is presented as a scientific database system. MIDAS applications for performing database operations on tables are discussed, for instance, the exchange of the data to and from the TFS, the selection of objects, the uncertainty joins across tables, and the graphical representation of data. This upgraded version of the TFS is a full implementation of the binary table extension of the FITS format; in addition, it also supports arrays of strings. Different storage strategies for optimal access of very large data sets are implemented and are addressed in detail. As a simple relational database, the TFS may be used for the management of personal data files. This opens the way to intelligent pipeline processing of large amounts of data. One of the key features of the Table File System is to provide also an extensive set of tools for the analysis of the final results of a reduction process. Column operations using standard and special mathematical functions as well as statistical distributions can be carried out; commands for linear regression and model fitting using nonlinear least square methods and user-defined functions are available. Finally, statistical tests of hypothesis and multivariate methods can also operate on tables.

  3. 26 CFR 1.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 13 2014-04-01 2014-04-01 false Required use of magnetic media for returns by...) Information Returns § 1.6033-4 Required use of magnetic media for returns by organizations required to file returns under section 6033. The return of an organization that is required to be filed on magnetic...

  4. 26 CFR 301.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 18 2010-04-01 2010-04-01 false Required use of magnetic media for returns by... ADMINISTRATION Information and Returns Returns and Records § 301.6033-4 Required use of magnetic media for... required to file returns under section 6033 on magnetic media. An organization required to file a...

  5. 78 FR 26337 - Notice of Filing of Self-Certification of Coal Capability Under the Powerplant and Industrial...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-06

    ... of Filing of Self-Certification of Coal Capability Under the Powerplant and Industrial Fuel Use Act... a coal capability self- certification to the Department of Energy (DOE) pursuant to Sec. 201(d) of... 501.60, 61. FUA and regulations thereunder require DOE to publish a notice of filing of...

  6. 77 FR 74473 - Notice of Filing of Self-Certification of Coal Capability Under the Powerplant and Industrial...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-14

    ... of Filing of Self-Certification of Coal Capability Under the Powerplant and Industrial Fuel Use Act... a coal capability self- certification to the Department of Energy (DOE) pursuant to Sec. 201(d) of... 501.60, 61. FUA and regulations thereunder require DOE to publish a notice of filing of...

  7. Record Storage Systems: From Paper Based Files to Electronic Image Systems.

    ERIC Educational Resources Information Center

    Gregory, Bob; Lonabocker, Louise

    1986-01-01

    Alternative methods of storing and handling the registrar's records are described, and their relative advantages and disadvantages are noted. The methods include paper files, micrographics (computer output microfilm and source document microfilm), and electronic image systems. (MSE)

  8. DEVELOPMENT OF THE NATIONAL ACID PRECIPITATION ASSESSMENT PROGRAM (NAPAP) EMISSIONS INVENTORY, 1980: THE FLEXIBLE REGIONAL EMISSIONS DATA SYSTEM (SOFTWARE, ALLOCATION FACTOR FILES, PERIPHERAL DATA FILES)

    EPA Science Inventory

    The package contains documentation of the Flexible Regional Emissions Data System (FREDS) for the 1980 NAPAP Emissions Inventory, FREDS source code, allocation factor files, and peripheral data files. FREDS extracts emissions data, pertinent modeling parameters (e.g., stack heigh...

  9. ATLAS, an integrated structural analysis and design system. Volume 4: Random access file catalog

    NASA Technical Reports Server (NTRS)

    Gray, F. P., Jr. (Editor)

    1979-01-01

    A complete catalog is presented for the random access files used by the ATLAS integrated structural analysis and design system. ATLAS consists of several technical computation modules which output data matrices to corresponding random access file. A description of the matrices written on these files is contained herein.

  10. Permit compliance system (PCS) facility address and permit information file national listing of major facilities (for microcomputers). Data file

    SciTech Connect

    1996-06-01

    The Permit Compliance System (PCS) is an Environmental Protection Agency (EPA) national computerized management information system that records water-discharge permit data on more than 64,000 wastewater treatment facilities nationwide. This system automates entry, updating, and retrieval of National Pollutant Discharge Elimination System (NPDES) data and tracks permit issuance, permit limits, monitoring data, and other data pertaining to facilities regulated under NPDES. The Permit Compliance System (PCS) Facility Address and Permit Information File contains primary mailing address information as well as permit number, facility type, and cognizant official for all active NPDES permitted facilities, general facility and permit events (e.g., issuance and expiration dates, types of ownership code, SIC code, and location including longitude and latitude) for all active NPDES permitted facilities for the most recent year. There are approximately 49,000 industrial facilities and 15,000 municipal facilities regulated by NPDES. This data is updated twice a year. The diskette contains only major facilities which are facilities having a design or actual flow of one million gallons per day or greater, a service population of 10,000 or greater, or a significant impact on water quality, i.e., with a potential for toxic discharge, located close to a drinking water intake, discharging into stressed receiving waters, or requiring advanced treatment. Approximately 7100 permits are issued to major facilities. Municipal and non-municipal facilities not meeting the above requirements are categorized as minor.

  11. Methods and apparatus for multi-resolution replication of files in a parallel computing system using semantic information

    DOEpatents

    Faibish, Sorin; Bent, John M.; Tzelnic, Percy; Grider, Gary; Torres, Aaron

    2015-10-20

    Techniques are provided for storing files in a parallel computing system using different resolutions. A method is provided for storing at least one file generated by a distributed application in a parallel computing system. The file comprises one or more of a complete file and a sub-file. The method comprises the steps of obtaining semantic information related to the file; generating a plurality of replicas of the file with different resolutions based on the semantic information; and storing the file and the plurality of replicas of the file in one or more storage nodes of the parallel computing system. The different resolutions comprise, for example, a variable number of bits and/or a different sub-set of data elements from the file. A plurality of the sub-files can be merged to reproduce the file.

  12. Implementing Journaling in a Linux Shared Disk File System

    NASA Technical Reports Server (NTRS)

    Preslan, Kenneth W.; Barry, Andrew; Brassow, Jonathan; Cattelan, Russell; Manthei, Adam; Nygaard, Erling; VanOort, Seth; Teigland, David; Tilstra, Mike; O'Keefe, Matthew; Erickson, Grant; Agarwal, Manish

    2000-01-01

    In computer systems today, speed and responsiveness is often determined by network and storage subsystem performance. Faster, more scalable networking interfaces like Fibre Channel and Gigabit Ethernet provide the scaffolding from which higher performance computer systems implementations may be constructed, but new thinking is required about how machines interact with network-enabled storage devices. In this paper we describe how we implemented journaling in the Global File System (GFS), a shared-disk, cluster file system for Linux. Our previous three papers on GFS at the Mass Storage Symposium discussed our first three GFS implementations, their performance, and the lessons learned. Our fourth paper describes, appropriately enough, the evolution of GFS version 3 to version 4, which supports journaling and recovery from client failures. In addition, GFS scalability tests extending to 8 machines accessing 8 4-disk enclosures were conducted: these tests showed good scaling. We describe the GFS cluster infrastructure, which is necessary for proper recovery from machine and disk failures in a collection of machines sharing disks using GFS. Finally, we discuss the suitability of Linux for handling the big data requirements of supercomputing centers.

  13. 17 CFR 242.608 - Filing and amendment of national market system plans.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... national market system plans. 242.608 Section 242.608 Commodity and Securities Exchanges SECURITIES AND... SECURITY FUTURES Regulation Nms-Regulation of the National Market System § 242.608 Filing and amendment of national market system plans. (a) Filing of national market system plans and amendments thereto. (1)...

  14. 17 CFR 242.608 - Filing and amendment of national market system plans.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... national market system plans. 242.608 Section 242.608 Commodity and Securities Exchanges SECURITIES AND... SECURITY FUTURES Regulation Nms-Regulation of the National Market System § 242.608 Filing and amendment of national market system plans. (a) Filing of national market system plans and amendments thereto. (1)...

  15. 18 CFR Appendix A to Part 380 - Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Requirements for Environmental Reports Under the Natural Gas Act A Appendix A to Part 380 Conservation of Power... REGULATIONS IMPLEMENTING THE NATIONAL ENVIRONMENTAL POLICY ACT Pt. 380, App. A Appendix A to Part 380—Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act Environmental Reports Under...

  16. 18 CFR Appendix A to Part 380 - Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... Requirements for Environmental Reports Under the Natural Gas Act A Appendix A to Part 380 Conservation of Power... REGULATIONS IMPLEMENTING THE NATIONAL ENVIRONMENTAL POLICY ACT Pt. 380, App. A Appendix A to Part 380—Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act Environmental Reports Under...

  17. 18 CFR Appendix A to Part 380 - Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Requirements for Environmental Reports Under the Natural Gas Act A Appendix A to Part 380 Conservation of Power... Filing Requirements for Environmental Reports Under the Natural Gas Act Environmental Reports Under the Natural Gas Act. Resource Report 1—General Project Description 1. Provide a detailed description...

  18. 18 CFR Appendix A to Part 380 - Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... Requirements for Environmental Reports Under the Natural Gas Act A Appendix A to Part 380 Conservation of Power... Filing Requirements for Environmental Reports Under the Natural Gas Act Environmental Reports Under the Natural Gas Act. Resource Report 1—General Project Description 1. Provide a detailed description...

  19. 18 CFR Appendix A to Part 380 - Minimum Filing Requirements for Environmental Reports Under the Natural Gas Act

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... Requirements for Environmental Reports Under the Natural Gas Act A Appendix A to Part 380 Conservation of Power... Filing Requirements for Environmental Reports Under the Natural Gas Act Environmental Reports Under the Natural Gas Act. Resource Report 1—General Project Description 1. Provide a detailed description...

  20. Methods and apparatus for capture and storage of semantic information with sub-files in a parallel computing system

    DOEpatents

    Faibish, Sorin; Bent, John M; Tzelnic, Percy; Grider, Gary; Torres, Aaron

    2015-02-03

    Techniques are provided for storing files in a parallel computing system using sub-files with semantically meaningful boundaries. A method is provided for storing at least one file generated by a distributed application in a parallel computing system. The file comprises one or more of a complete file and a plurality of sub-files. The method comprises the steps of obtaining a user specification of semantic information related to the file; providing the semantic information as a data structure description to a data formatting library write function; and storing the semantic information related to the file with one or more of the sub-files in one or more storage nodes of the parallel computing system. The semantic information provides a description of data in the file. The sub-files can be replicated based on semantically meaningful boundaries.

  1. Derived virtual devices: a secure distributed file system mechanism

    NASA Technical Reports Server (NTRS)

    VanMeter, Rodney; Hotz, Steve; Finn, Gregory

    1996-01-01

    This paper presents the design of derived virtual devices (DVDs). DVDs are the mechanism used by the Netstation Project to provide secure shared access to network-attached peripherals distributed in an untrusted network environment. DVDs improve Input/Output efficiency by allowing user processes to perform I/O operations directly from devices without intermediate transfer through the controlling operating system kernel. The security enforced at the device through the DVD mechanism includes resource boundary checking, user authentication, and restricted operations, e.g., read-only access. To illustrate the application of DVDs, we present the interactions between a network-attached disk and a file system designed to exploit the DVD abstraction. We further discuss third-party transfer as a mechanism intended to provide for efficient data transfer in a typical NAP environment. We show how DVDs facilitate third-party transfer, and provide the security required in a more open network environment.

  2. 75 FR 52527 - New York Independent System Operator, Inc. Notice of Filings

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-26

    ... Energy Regulatory Commission New York Independent System Operator, Inc. Notice of Filings August 19, 2010... New York Independent System Operator, Inc., the International Transmission Company, and the Midwest... Regulatory Commission's July 15, 2010 Order on Compliance Filing, New York Independent System Operator,...

  3. Code System to Replace Files 4 and 6 of ENDF-6 with Files 4 and 5 of ENDF/B-IV.

    Energy Science and Technology Software Center (ESTSC)

    1992-06-12

    Version 00 MIXEN replaces files 4 and 6 of the Evaluated Nuclear Data File version 6 (ENDF-6) by files 4 and 5 of ENDF/B-IV. Withe the use of this program, several nuclear data processing systems which were not designed to process the new double-differential data of ENDF-6 can be used to generate multigroup libraries based on the newly evaluated resonance parameters and cross section given in files 2 and 3 of ENDF-6 and the angularmore » distributions given in files 4 and 5 of END/B-IV.« less

  4. 78 FR 79690 - California Independent System Operator Corporation; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-31

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission California Independent System Operator Corporation; Notice of Filing Take notice that on December 20, 2013, the California Independent System Operator Corporation (CAISO) filed a refund report to be made by the...

  5. 76 FR 31956 - High Island Offshore System, L.L.C.; Notice of Compliance Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-02

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission High Island Offshore System, L.L.C.; Notice of Compliance Filing Take notice that on May 16, 2011, High Island Offshore System, L.L.C. (HIOS) filed to comply with the Commission's ``Order Approving, as...

  6. 75 FR 27986 - Electronic Filing System-Web (EFS-Web) Contingency Option

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-19

    ... for Electronic Filing System--Web (EFS-Web), 74 FR 55200, 55204 (October 27, 2009) (notice), and... the same level of security as EFS-Web for unregistered e-filers by using Transport Layer Security (TLS... United States Patent and Trademark Office Electronic Filing System--Web (EFS-Web) Contingency...

  7. 75 FR 3939 - Merit Systems Protection Board (MSPB) Provides Notice of Opportunity To File Amicus Briefs

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-25

    ... BOARD Merit Systems Protection Board (MSPB) Provides Notice of Opportunity To File Amicus Briefs AGENCY..., the Merit Systems Protection Board (MSPB) is providing notice of the opportunity to file amicus briefs... eligibility for employment in a sensitive position. Interested parties may submit amicus briefs or...

  8. 5 CFR 293.504 - Composition of, and access to, the Employee Medical File System.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 1 2014-01-01 2014-01-01 false Composition of, and access to, the Employee Medical File System. 293.504 Section 293.504 Administrative Personnel OFFICE OF PERSONNEL... Composition of, and access to, the Employee Medical File System. (a) All employee occupational medical...

  9. 5 CFR 293.504 - Composition of, and access to, the Employee Medical File System.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Composition of, and access to, the Employee Medical File System. 293.504 Section 293.504 Administrative Personnel OFFICE OF PERSONNEL... Composition of, and access to, the Employee Medical File System. (a) All employee occupational medical...

  10. 5 CFR 293.504 - Composition of, and access to, the Employee Medical File System.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 5 Administrative Personnel 1 2012-01-01 2012-01-01 false Composition of, and access to, the Employee Medical File System. 293.504 Section 293.504 Administrative Personnel OFFICE OF PERSONNEL... Composition of, and access to, the Employee Medical File System. (a) All employee occupational medical...

  11. 5 CFR 293.504 - Composition of, and access to, the Employee Medical File System.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 1 2013-01-01 2013-01-01 false Composition of, and access to, the Employee Medical File System. 293.504 Section 293.504 Administrative Personnel OFFICE OF PERSONNEL... Composition of, and access to, the Employee Medical File System. (a) All employee occupational medical...

  12. 5 CFR 293.504 - Composition of, and access to, the Employee Medical File System.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 1 2011-01-01 2011-01-01 false Composition of, and access to, the Employee Medical File System. 293.504 Section 293.504 Administrative Personnel OFFICE OF PERSONNEL... Composition of, and access to, the Employee Medical File System. (a) All employee occupational medical...

  13. 20 CFR 30.102 - In general, how does an employee file a claim for additional impairment or wage-loss under Part E...

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false In general, how does an employee file a claim... an employee file a claim for additional impairment or wage-loss under Part E of EEOICPA? (a) An employee previously awarded impairment benefits by OWCP may file a claim for additional impairment...

  14. 76 FR 2049 - Suspension of the Duty To File Reports for Classes of Asset-Backed Securities Under Section 15(d...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-12

    ... COMMISSION 17 CFR Parts 240 and 249 RIN 3235-AK89 Suspension of the Duty To File Reports for Classes of Asset... and Consumer Protection Act eliminated the automatic suspension of the duty to file under Section 15(d.../proposed.shtml ); Send an e-mail to rule-comments@sec.gov . Please include File Number S7-02-11 on...

  15. PC reporting system for radiologists: practical use under PACS environment.

    PubMed

    Nakata, N; Yoshihiro, S; Miida, K; Tashima, M; Sunakawa, Y; Harada, J; Tada, S; Fukuda, K

    2001-07-01

    To evaluate the practical usefulness of several types of the reporting system especially for radiologists, we have developed and employed several reporting systems. We categorized those reporting systems as follows (1) stand alone PC reporting system; (2) linked reporting system with PACS environment; (3) integrated three-dimensional (3D) imaging workstation (WS) with the intranet. We have evaluated the advantages and disadvantages of those three systems, and compared between the reporting system without PACS and network reporting system with PACS. Using linked reporting system with PACS, radiologists could easily reference both previous reports and archived diagnostic images, and also make their teaching files quickly. In conclusion, the reporting system under PACS environment is found to be practical and helpful for Japanese radiologists. PMID:11378217

  16. Development of a user-centered radiology teaching file system

    NASA Astrophysics Data System (ADS)

    dos Santos, Marcelo; Fujino, Asa

    2011-03-01

    Learning radiology requires systematic and comprehensive study of a large knowledge base of medical images. In this work is presented the development of a digital radiology teaching file system. The proposed system has been created in order to offer a set of customized services regarding to users' contexts and their informational needs. This has been done by means of an electronic infrastructure that provides easy and integrated access to all relevant patient data at the time of image interpretation, so that radiologists and researchers can examine all available data to reach well-informed conclusions, while protecting patient data privacy and security. The system is presented such as an environment which implements a distributed clinical database, including medical images, authoring tools, repository for multimedia documents, and also a peer-reviewed model which assures dataset quality. The current implementation has shown that creating clinical data repositories on networked computer environments points to be a good solution in terms of providing means to review information management practices in electronic environments and to create customized and contextbased tools for users connected to the system throughout electronic interfaces.

  17. 75 FR 48629 - Electronic Tariff Filing System (ETFS)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-11

    ...In this document, the Federal Communications Commission (Commission) seeks comment on extending the electronic tariff filing requirement for incumbent local exchange carriers to all carriers that file tariffs and related documents. Additionally, the Commission seeks comment on the appropriate time frame for implementing this proposed requirement. The Commission also seeks comment on the......

  18. 76 FR 67179 - Spartanburg Water System; Notice of Preliminary Permit Application Accepted for Filing and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-31

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Spartanburg Water System; Notice of Preliminary Permit Application Accepted..., Spartanburg Water System (Spartanburg) filed an application for a preliminary permit, pursuant to section...

  19. 77 FR 16220 - Spartanburg Water System; Notice of Preliminary Permit Application Accepted for Filing and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-20

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Spartanburg Water System; Notice of Preliminary Permit Application Accepted..., 2011, Spartanburg Water System (Spartanburg) filed an application for a preliminary permit, pursuant...

  20. Amphiphilic Systems under shear flow

    NASA Astrophysics Data System (ADS)

    Guo, Hongxia

    2008-03-01

    Phase behavior and the related physical and rheological properties of the amphiphilic systems including liquid crystals, diblock copolymers and surfactants are of wide-spread interest, e.g. in industrial processing of layered materials or biological applications of lipid membranes. For example, submitted to an applied shear flow, these lamellae show an interesting coupling of the layer orientation and the flow field. Despite an extensive literature dealing with the shear-induced transition, the underlying causes and mechanisms of the transition remain largely speculative. The experimental similarities between systems of different molecular constituents indicate, that the theoretical description of these reorientations can be constructed, from a common generic basis. Hence one can develop an efficient computer model which is able to reproduce the properties pertinent to real amphiphilic systems, and allows for a large-scale simulation. Here, I employed a simplified continuum amphiphilic computer model to investigate the shear--induced disorder-order, order-order and alignment flipping by large-scale parallelized (none) equilibrium molecular dynamics simulation

  1. Development of a Technical Data File On the Design and Use of Instructional Systems.

    ERIC Educational Resources Information Center

    Schumacher, Sanford P.

    A technical data file concerned with the technology of Instructional System Development suitable for a variety of users was developed. The file was prepared in a way amenable to later computerized storage and retrieval. General information sources and indexes of highly probable relevance were reviewed with key words and relevant specialty journals…

  2. 77 FR 2056 - Midwest Independent Transmission System Operator, Inc.; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-13

    ... electronic submission of protests and interventions in lieu of paper using the ``eFiling'' link at http://www... 20426. This filing is accessible on-line at http://www.ferc.gov , using the ``eLibrary'' link and is... Energy Regulatory Commission Midwest Independent Transmission System Operator, Inc.; Notice of...

  3. 29 CFR 15.200 - What is a claim under the MPCECA and who may file such a claim?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 1 2013-07-01 2013-07-01 false What is a claim under the MPCECA and who may file such a claim? 15.200 Section 15.200 Labor Office of the Secretary of Labor ADMINISTRATIVE CLAIMS UNDER THE FEDERAL TORT CLAIMS ACT AND RELATED CLAIMS STATUTES Claims Under the Military Personnel and Civilian Employees' Claims Act of 1964 § 15.200 What is...

  4. Maintaining a Distributed File System by Collection and Analysis of Metrics

    NASA Technical Reports Server (NTRS)

    Bromberg, Daniel

    1997-01-01

    AFS(originally, Andrew File System) is a widely-deployed distributed file system product used by companies, universities, and laboratories world-wide. However, it is not trivial to operate: runing an AFS cell is a formidable task. It requires a team of dedicated and experienced system administratores who must manage a user base numbring in the thousands, rather than the smaller range of 10 to 500 faced by the typical system administrator.

  5. Cooperative storage of shared files in a parallel computing system with dynamic block size

    DOEpatents

    Bent, John M.; Faibish, Sorin; Grider, Gary

    2015-11-10

    Improved techniques are provided for parallel writing of data to a shared object in a parallel computing system. A method is provided for storing data generated by a plurality of parallel processes to a shared object in a parallel computing system. The method is performed by at least one of the processes and comprises: dynamically determining a block size for storing the data; exchanging a determined amount of the data with at least one additional process to achieve a block of the data having the dynamically determined block size; and writing the block of the data having the dynamically determined block size to a file system. The determined block size comprises, e.g., a total amount of the data to be stored divided by the number of parallel processes. The file system comprises, for example, a log structured virtual parallel file system, such as a Parallel Log-Structured File System (PLFS).

  6. 26 CFR 1.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 13 2011-04-01 2011-04-01 false Required use of magnetic media for returns by organizations required to file returns under section 6033. 1.6033-4 Section 1.6033-4 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Information Returns §...

  7. 26 CFR 1.6033-4 - Required use of magnetic media for returns by organizations required to file returns under...

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 13 2012-04-01 2012-04-01 false Required use of magnetic media for returns by organizations required to file returns under section 6033. 1.6033-4 Section 1.6033-4 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Information Returns §...

  8. 26 CFR 1.1503(d)-1 - Definitions and special rules for filings under section 1503(d).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... section 1503(d). 1.1503(d)-1 Section 1.1503(d)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF... Other Rules § 1.1503(d)-1 Definitions and special rules for filings under section 1503(d). (a) In general. This section and §§ 1.1503(d)-2 through 1.1503(d)-8 provide rules concerning the...

  9. 26 CFR 1.1503(d)-1 - Definitions and special rules for filings under section 1503(d).

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... section 1503(d). 1.1503(d)-1 Section 1.1503(d)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF... Other Rules § 1.1503(d)-1 Definitions and special rules for filings under section 1503(d). (a) In general. This section and §§ 1.1503(d)-2 through 1.1503(d)-8 provide rules concerning the...

  10. 26 CFR 1.1503(d)-1 - Definitions and special rules for filings under section 1503(d).

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... section 1503(d). 1.1503(d)-1 Section 1.1503(d)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF... Other Rules § 1.1503(d)-1 Definitions and special rules for filings under section 1503(d). (a) In general. This section and §§ 1.1503(d)-2 through 1.1503(d)-8 provide rules concerning the...

  11. 20 CFR 10.10 - Are all documents relating to claims filed under the FECA considered confidential?

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Are all documents relating to claims filed under the FECA considered confidential? 10.10 Section 10.10 Employees' Benefits OFFICE OF WORKERS' COMPENSATION PROGRAMS, DEPARTMENT OF LABOR FEDERAL EMPLOYEES' COMPENSATION ACT CLAIMS FOR COMPENSATION...

  12. 20 CFR 10.10 - Are all documents relating to claims filed under the FECA considered confidential?

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true Are all documents relating to claims filed under the FECA considered confidential? 10.10 Section 10.10 Employees' Benefits OFFICE OF WORKERS' COMPENSATION PROGRAMS, DEPARTMENT OF LABOR FEDERAL EMPLOYEES' COMPENSATION ACT CLAIMS FOR COMPENSATION...

  13. 75 FR 29312 - Notice Regarding the Elimination of the Fee for Petitions To Make Special Filed Under the Patent...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-25

    ... Patent and Trademark Office Notice Regarding the Elimination of the Fee for Petitions To Make Special Filed Under the Patent Prosecution Highway (PPH) Programs AGENCY: United States Patent and Trademark Office, Commerce. ACTION: Notice. SUMMARY: The United States Patent and Trademark Office (USPTO)...

  14. 37 CFR 201.33 - Procedures for filing Notices of Intent to Enforce a restored copyright under the Uruguay Round...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2012-07-01 2012-07-01 false Procedures for filing Notices of Intent to Enforce a restored copyright under the Uruguay Round Agreements Act. 201.33 Section 201.33 Patents, Trademarks, and Copyrights COPYRIGHT OFFICE, LIBRARY OF CONGRESS COPYRIGHT OFFICE AND PROCEDURES GENERAL PROVISIONS § 201.33...

  15. 29 CFR 15.200 - What is a claim under the MPCECA and who may file such a claim?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... FEDERAL TORT CLAIMS ACT AND RELATED CLAIMS STATUTES Claims Under the Military Personnel and Civilian... Department or by a spouse or authorized agent, or legal representative on behalf of the employee. If the employee is deceased, the claim may be filed by a survivor in the following order of preference:...

  16. 10 CFR 708.15 - What happens if an employee files a complaint under this part and also pursues a remedy under...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... of jurisdiction; (2) Your complaint was filed under 48 CFR part 3, Subpart 3.9 and the Inspector General, after conducting an initial inquiry, determines not to pursue it; or (3) You have exhausted... ENERGY DOE CONTRACTOR EMPLOYEE PROTECTION PROGRAM Employee Complaint Resolution Process § 708.15...

  17. Layered Systems Under Shear Flow

    NASA Astrophysics Data System (ADS)

    Svenšek, Daniel; Brand, Helmut R.

    We discuss and review a generalization of the usual hydrodynamic description of smectic A liquid crystals motivated by the experimentally observed shear-induced destabilization and reorientation of smectic A like systems. We include both the smectic layering (via the layer displacement u and the layer normal hat{p}) and the director hat{n} of the underlying nematic order in our macroscopic hydrodynamic description and allow both directions to differ in non equilibrium situations. In a homeotropically aligned sample the nematic director couples to an applied simple shear, whereas the smectic layering stays unchanged. This difference leads to a finite (but usually small) angle between hat{n} and hat{p}, which we find to be equivalent to an effective dilatation of the layers. This effective dilatation leads, above a certain threshold, to an undulation instability of the layers with a wave vector parallel to the vorticity direction of the shear flow. We include the couplings of the velocity field with the order parameters for orientational and positional order and show how the order parameters interact with the undulation instability. We explore the influence of the magnitude of various material parameters on the instability. Comparing our results to available experimental results and molecular dynamic simulations, we find good qualitative agreement for the first instability. In addition, we discuss pathways to higher instabilities leading to the formation of onions (multilamellar vesicles) via cylindrical structures and/or the break-up of layers via large amplitude undulations.

  18. A resources monitoring architecture for P2P file-sharing systems

    NASA Astrophysics Data System (ADS)

    Wang, Wenxian; Chen, Xingshu; Wang, Haizhou

    2013-07-01

    Resources monitoring is an important problem of the overall efficient usage and control of P2P file-sharing systems. The resources of file-sharing systems can include all distributing servers, programs and peers. Several researches have tried to address this issue, but most of them illuminated P2P traffic characterization, identification and user behavior. Based on previous work, we present a resources monitoring architecture for P2P file-sharing systems. The monitoring architecture employs a hierarchical structure and provides systemic monitoring including resources discovery, relative information extraction and analysis, trace and location. It gives a systematic framework for file-sharing resources monitoring. And a prototype system has been developed based on the framework.

  19. Toward Millions of File System IOPS on Low-Cost, Commodity Hardware

    PubMed Central

    Zheng, Da; Burns, Randal; Szalay, Alexander S.

    2013-01-01

    We describe a storage system that removes I/O bottlenecks to achieve more than one million IOPS based on a user-space file abstraction for arrays of commodity SSDs. The file abstraction refactors I/O scheduling and placement for extreme parallelism and non-uniform memory and I/O. The system includes a set-associative, parallel page cache in the user space. We redesign page caching to eliminate CPU overhead and lock-contention in non-uniform memory architecture machines. We evaluate our design on a 32 core NUMA machine with four, eight-core processors. Experiments show that our design delivers 1.23 million 512-byte read IOPS. The page cache realizes the scalable IOPS of Linux asynchronous I/O (AIO) and increases user-perceived I/O performance linearly with cache hit rates. The parallel, set-associative cache matches the cache hit rates of the global Linux page cache under real workloads. PMID:24402052

  20. NASA Uniform Files Index

    NASA Technical Reports Server (NTRS)

    1987-01-01

    This handbook is a guide for the use of all personnel engaged in handling NASA files. It is issued in accordance with the regulations of the National Archives and Records Administration, in the Code of Federal Regulations Title 36, Part 1224, Files Management; and the Federal Information Resources Management Regulation, Subpart 201-45.108, Files Management. It is intended to provide a standardized classification and filing scheme to achieve maximum uniformity and ease in maintaining and using agency records. It is a framework for consistent organization of information in an arrangement that will be useful to current and future researchers. The NASA Uniform Files Index coding structure is composed of the subject classification table used for NASA management directives and the subject groups in the NASA scientific and technical information system. It is designed to correlate files throughout NASA and it is anticipated that it may be useful with automated filing systems. It is expected that in the conversion of current files to this arrangement it will be necessary to add tertiary subjects and make further subdivisions under the existing categories. Established primary and secondary subject categories may not be changed arbitrarily. Proposals for additional subject categories of NASA-wide applicability, and suggestions for improvement in this handbook, should be addressed to the Records Program Manager at the pertinent installation who will forward it to the NASA Records Management Office, Code NTR, for approval. This handbook is issued in loose-leaf form and will be revised by page changes.

  1. 20 CFR 30.102 - In general, how does an employee file a claim for additional impairment or wage-loss under Part E...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... ILLNESS COMPENSATION PROGRAM ACT OF 2000 CLAIMS FOR COMPENSATION UNDER THE ENERGY EMPLOYEES OCCUPATIONAL ILLNESS COMPENSATION PROGRAM ACT OF 2000, AS AMENDED Filing Claims; Evidence and Burden of Proof; Special Procedures for Certain Cancer Claims Filing Claims for Benefits Under Eeoicpa § 30.102 In general, how...

  2. Using Hadoop File System and MapReduce in a small/medium Grid site

    NASA Astrophysics Data System (ADS)

    Riahi, H.; Donvito, G.; Fanò, L.; Fasi, M.; Marzulli, G.; Spiga, D.; Valentini, A.

    2012-12-01

    Data storage and data access represent the key of CPU-intensive and data-intensive high performance Grid computing. Hadoop is an open-source data processing framework that includes fault-tolerant and scalable distributed data processing model and execution environment, named MapReduce, and distributed File System, named Hadoop distributed File System (HDFS). HDFS was deployed and tested within the Open Science Grid (OSG) middleware stack. Efforts have been taken to integrate HDFS with gLite middleware. We have tested the File System thoroughly in order to understand its scalability and fault-tolerance while dealing with small/medium site environment constraints. To benefit entirely from this File System, we made it working in conjunction with Hadoop Job scheduler to optimize the executions of the local physics analysis workflows. The performance of the analysis jobs which used such architecture seems to be promising, making it useful to follow up in the future.

  3. The Fifth Workshop on HPC Best Practices: File Systems and Archives

    SciTech Connect

    Hick, Jason; Hules, John; Uselton, Andrew

    2011-11-30

    The workshop on High Performance Computing (HPC) Best Practices on File Systems and Archives was the fifth in a series sponsored jointly by the Department Of Energy (DOE) Office of Science and DOE National Nuclear Security Administration. The workshop gathered technical and management experts for operations of HPC file systems and archives from around the world. Attendees identified and discussed best practices in use at their facilities, and documented findings for the DOE and HPC community in this report.

  4. Performance of the engineering analysis and data system 2 common file system

    NASA Technical Reports Server (NTRS)

    Debrunner, Linda S.

    1993-01-01

    The Engineering Analysis and Data System (EADS) was used from April 1986 to July 1993 to support large scale scientific and engineering computation (e.g. computational fluid dynamics) at Marshall Space Flight Center. The need for an updated system resulted in a RFP in June 1991, after which a contract was awarded to Cray Grumman. EADS II was installed in February 1993, and by July 1993 most users were migrated. EADS II is a network of heterogeneous computer systems supporting scientific and engineering applications. The Common File System (CFS) is a key component of this system. The CFS provides a seamless, integrated environment to the users of EADS II including both disk and tape storage. UniTree software is used to implement this hierarchical storage management system. The performance of the CFS suffered during the early months of the production system. Several of the performance problems were traced to software bugs which have been corrected. Other problems were associated with hardware. However, the use of NFS in UniTree UCFM software limits the performance of the system. The performance issues related to the CFS have led to a need to develop a greater understanding of the CFS organization. This paper will first describe the EADS II with emphasis on the CFS. Then, a discussion of mass storage systems will be presented, and methods of measuring the performance of the Common File System will be outlined. Finally, areas for further study will be identified and conclusions will be drawn.

  5. Lessons Learned in Deploying the World s Largest Scale Lustre File System

    SciTech Connect

    Dillow, David A; Fuller, Douglas; Wang, Feiyi; Oral, H Sarp; Zhang, Zhe; Hill, Jason J; Shipman, Galen M

    2010-01-01

    The Spider system at the Oak Ridge National Laboratory's Leadership Computing Facility (OLCF) is the world's largest scale Lustre parallel file system. Envisioned as a shared parallel file system capable of delivering both the bandwidth and capacity requirements of the OLCF's diverse computational environment, the project had a number of ambitious goals. To support the workloads of the OLCF's diverse computational platforms, the aggregate performance and storage capacity of Spider exceed that of our previously deployed systems by a factor of 6x - 240 GB/sec, and 17x - 10 Petabytes, respectively. Furthermore, Spider supports over 26,000 clients concurrently accessing the file system, which exceeds our previously deployed systems by nearly 4x. In addition to these scalability challenges, moving to a center-wide shared file system required dramatically improved resiliency and fault-tolerance mechanisms. This paper details our efforts in designing, deploying, and operating Spider. Through a phased approach of research and development, prototyping, deployment, and transition to operations, this work has resulted in a number of insights into large-scale parallel file system architectures, from both the design and the operational perspectives. We present in this paper our solutions to issues such as network congestion, performance baselining and evaluation, file system journaling overheads, and high availability in a system with tens of thousands of components. We also discuss areas of continued challenges, such as stressed metadata performance and the need for file system quality of service alongside with our efforts to address them. Finally, operational aspects of managing a system of this scale are discussed along with real-world data and observations.

  6. Security in the CernVM File System and the Frontier Distributed Database Caching System

    NASA Astrophysics Data System (ADS)

    Dykstra, D.; Blomer, J.

    2014-06-01

    Both the CernVM File System (CVMFS) and the Frontier Distributed Database Caching System (Frontier) distribute centrally updated data worldwide for LHC experiments using http proxy caches. Neither system provides privacy or access control on reading the data, but both control access to updates of the data and can guarantee the authenticity and integrity of the data transferred to clients over the internet. CVMFS has since its early days required digital signatures and secure hashes on all distributed data, and recently Frontier has added X.509-based authenticity and integrity checking. In this paper we detail and compare the security models of CVMFS and Frontier.

  7. Security in the CernVM File System and the Frontier Distributed Database Caching System

    SciTech Connect

    Dykstra, D.; Blomer, J.

    2014-01-01

    Both the CernVM File System (CVMFS) and the Frontier Distributed Database Caching System (Frontier) distribute centrally updated data worldwide for LHC experiments using http proxy caches. Neither system provides privacy or access control on reading the data, but both control access to updates of the data and can guarantee the authenticity and integrity of the data transferred to clients over the internet. CVMFS has since its early days required digital signatures and secure hashes on all distributed data, and recently Frontier has added X.509-based authenticity and integrity checking. In this paper we detail and compare the security models of CVMFS and Frontier.

  8. Impact of different file systems on the amount of apically extruded debris during endodontic retreatment

    PubMed Central

    Uzunoglu, Emel; Turker, Sevinc Aktemur

    2016-01-01

    Objective: The goal of present study was to determine the effect of different nickel–titanium file systems on the amount of apically extruded debris during endodontic retreatment: D-RaCe retreatment systems, EdgeFile XR retreatment rotary files, and Reciproc R40. Materials and Methods: Thirty-six single-rooted prepared mandibular premolar teeth were filled with Gutta-percha and AH Plus sealer. The teeth were then randomly assigned into three groups (n = 12) for retreatment. The endodontic retreatment was performed as follows: D-RaCe, EdgeFile XR, Reciproc 40. Debris extruded apically during the retreatment was collected into preweighed Eppendorf tubes. An incubator was used to store tubes at 70° C for 5 days. The initial weight was subtracted from final weight of the Eppendorf tubes to calculate the weight of the dry extruded debris for each group. The data obtained were evaluated using Welch analysis of variance and Games-Howell post-hoc tests (P < 0.05). Results: All files resulted in apical extrusion of debris. Reciproc caused significantly less debris extrusion compared to D-RaCe and EdgeFile XR (P < 0.05). Conclusions: The findings revealed that during endodontic retreatment, number, and taper of files might have an influence on the amount of apically extruded debris during endodontic retreatment. PMID:27095898

  9. Recent Developments in the CernVM-File System Server Backend

    NASA Astrophysics Data System (ADS)

    Meusel, R.; Blomer, J.; Buncic, P.; Ganis, G.; Heikkila, S.

    2015-05-01

    The CernVM File System (CernVM-FS) is a snapshotting read-only file system designed to deliver software to grid worker nodes over HTTP in a fast, scalable and reliable way. In recent years it became the de-facto standard method to distribute HEP experiment software in the WLCG and starts to be adopted by other grid computing communities outside HEP. This paper focusses on the recent developments of the CernVM-FS Server, the central publishing point of new file system snapshots. Using a union file system, the CernVM-FS Server allows for direct manipulation of a (normally read-only) CernVM-FS volume with copy-on-write semantics. Eventually the collected changeset is transformed into a new CernVM-FS snapshot, constituting a transactional feedback loop. The generated repository data is pushed into a content addressable storage requiring only a RESTful interface and gets distributed through a hierarchy of caches to individual grid worker nodes. Additonally we describe recent features, such as file chunking, repository garbage collection and file system history that enable CernVM- FS for a wider range of use cases.

  10. A new ultrasonic canal preparation system with electronic monitoring of file tip position.

    PubMed

    Kobayashi, C; Yoshioka, T; Suda, H

    1996-09-01

    A new ultrasonic root canal preparation system has been developed that electronically monitors the location of the file tip during all instrumentation procedures. The Root ZX has been adapted for this purpose, and its filter circuit effectively cuts out the large spike noise of the ultrasonic unit. During enlargement of the canal, the ultrasonic vibration of the file can be stopped at any desired position on the meter. Extracted human tooth models with electronically measurable canals were used to test the device. Pre- and postoperative shapes of the root canals were evaluated using contact microradiography. The autostop mechanism worked correctly. Using a weak power and fine files, straightening, ledge formation, and file breakage were minimal. It seems that this system minimized the danger of overinstrumentation and could be safely applied in clinical practice. PMID:9198433

  11. Virtual file system on NoSQL for processing high volumes of HL7 messages.

    PubMed

    Kimura, Eizen; Ishihara, Ken

    2015-01-01

    The Standardized Structured Medical Information Exchange (SS-MIX) is intended to be the standard repository for HL7 messages that depend on a local file system. However, its scalability is limited. We implemented a virtual file system using NoSQL to incorporate modern computing technology into SS-MIX and allow the system to integrate local patient IDs from different healthcare systems into a universal system. We discuss its implementation using the database MongoDB and describe its performance in a case study. PMID:25991240

  12. Planning ATES systems under uncertainty

    NASA Astrophysics Data System (ADS)

    Jaxa-Rozen, Marc; Kwakkel, Jan; Bloemendal, Martin

    2015-04-01

    Aquifer Thermal Energy Storage (ATES) can contribute to significant reductions in energy use within the built environment, by providing seasonal energy storage in aquifers for the heating and cooling of buildings. ATES systems have experienced a rapid uptake over the last two decades; however, despite successful experiments at the individual level, the overall performance of ATES systems remains below expectations - largely due to suboptimal practices for the planning and operation of systems in urban areas. The interaction between ATES systems and underground aquifers can be interpreted as a common-pool resource problem, in which thermal imbalances or interference could eventually degrade the storage potential of the subsurface. Current planning approaches for ATES systems thus typically follow the precautionary principle. For instance, the permitting process in the Netherlands is intended to minimize thermal interference between ATES systems. However, as shown in recent studies (Sommer et al., 2015; Bakr et al., 2013), a controlled amount of interference may benefit the collective performance of ATES systems. An overly restrictive approach to permitting is instead likely to create an artificial scarcity of available space, limiting the potential of the technology in urban areas. In response, master plans - which take into account the collective arrangement of multiple systems - have emerged as an increasingly popular alternative. However, permits and master plans both take a static, ex ante view of ATES governance, making it difficult to predict the effect of evolving ATES use or climactic conditions on overall performance. In particular, the adoption of new systems by building operators is likely to be driven by the available subsurface space and by the performance of existing systems; these outcomes are themselves a function of planning parameters. From this perspective, the interactions between planning authorities, ATES operators, and subsurface conditions

  13. The global unified parallel file system (GUPFS) project: FY 2002 activities and results

    SciTech Connect

    Butler, Gregory F.; Lee, Rei Chi; Welcome, Michael L.

    2003-04-07

    The Global Unified Parallel File System (GUPFS) project is a multiple-phase, five-year project at the National Energy Research Scientific Computing (NERSC) Center to provide a scalable, high performance, high bandwidth, shared file system for all the NERSC production computing and support systems. The primary purpose of the GUPFS project is to make it easier to conduct advanced scientific research using the NERSC systems. This is to be accomplished through the use of a shared file system providing a unified file namespace, operating on consolidated shared storage that is directly accessed by all the NERSC production computing and support systems. During its first year, FY 2002, the GUPFS project focused on identifying, testing, and evaluating existing and emerging shared/cluster file system, SAN fabric, and storage technologies; identifying NERSC user input/output (I/O) requirements, methods, and mechanisms; and developing appropriate benchmarking methodologies and benchmark codes for a parallel environment. This report presents the activities and progress of the GUPFS project during its first year, the results of the evaluations conducted, and plans for near-term and longer-term investigations.

  14. 17 CFR 259.5s - Form U5S, for annual reports filed under section 5(c) of the Act.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... holding company. Editorial Note: For Federal Register citations affecting Form U5S, see the List of CFR... filed under section 5(c) of the Act. 259.5s Section 259.5s Commodity and Securities Exchanges SECURITIES... 1935 Forms for Registration and Annual Supplements § 259.5s Form U5S, for annual reports filed...

  15. 17 CFR 259.5s - Form U5S, for annual reports filed under section 5(c) of the Act.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... holding company. Editorial Note: For Federal Register citations affecting Form U5S, see the List of CFR... filed under section 5(c) of the Act. 259.5s Section 259.5s Commodity and Securities Exchanges SECURITIES... 1935 Forms for Registration and Annual Supplements § 259.5s Form U5S, for annual reports filed...

  16. Handheld access to radiology teaching files: an automated system for format conversion and content creation

    NASA Astrophysics Data System (ADS)

    Raman, Raghav; Raman, Lalithakala; Raman, Bhargav; Gold, Garry; Beaulieu, Christopher F.

    2002-05-01

    Current handheld Personal Digital Assistants (PDAs) can be used to view radiology teaching files. We have developed a toolkit that allows rapid creation of radiology teaching files in handheld formats from existing repositories. Our toolkit incorporated a desktop converter, a web conversion server and an application programming interface (API). Our API was integrated with an existing pilot teaching file database. We evaluated our system by obtaining test DICOM and JPEG images from our PACS system, our pilot database and from personal collections and converting them on a Windows workstation (Microsoft, Redmond, CA) and on other platforms using the web server. Our toolkit anonymized, annotated and categorized images using DICOM header information and data entered by the authors. Image processing was automatically customized for the target handheld device. We used freeware handheld image viewers as well as our custom applications that allowed window/level manipulation and viewing of additional textual information. Our toolkit provides desktop and web access to image conversion tools to produce organized handheld teaching file packages for most handheld devices and our API allows existing teaching file databases to incorporate handheld compatibility. The distribution of radiology teaching files on PDAs can increase the accessibility to radiology teaching.

  17. Electronic teaching files: seven-year experience using a commercial picture archiving and communication system.

    PubMed

    Siegel, E; Reiner, B

    2001-06-01

    With the advent of electronic imaging and the internet, the ability to create, search, access, and archive digital imaging teaching files has dramatically improved. Despite the fact that a picture archival and communication system (PACS) has the potential to greatly simplify the creation of, archival, and access to a department or multifacility teaching file, this potential has not yet been satisfactorily realized in our own and most other PACS installations. Several limitations of the teaching file tools within our PACS have become apparent over time. These have, at our facility, resulted in a substantially reduced role of the teaching file tools for conferences, daily teaching, and research purposes. With the PACS at our institution, academic folders can only be created by the systems engineer, which often serves as an impediment to the teaching process. Once these folders are created, multiple steps are required to identify the appropriate folders, and subsequently save images. Difficulties exist for those attempting to search for the teaching file images. Without pre-existing knowledge of the folder name and contents, it is difficult to query the system for specific images. This is due to the fact that there is currently no fully satisfactory mechanism for categorizing, indexing, and searching cases using the PACS. There is currently no easy mechanism to save teaching, research, or clinical files onto a CD or other removable media or to automatically strip demographic or other patient information from the images. PACS vendors should provide much more sophisticated tools to create and annotate teaching file images in an easy to use but standard format (possibly Radiological Society of North America's Medical Image Resource Center [MIRC] format) that could be exchanged with other sites and other vendors' PAC systems. The privilege to create teaching or conference files should be given to the individual radiologists, technologists, and other users, and an audit

  18. High performance file compression algorithm for video-on-demand e-learning system

    NASA Astrophysics Data System (ADS)

    Nomura, Yoshihiko; Matsuda, Ryutaro; Sakamoto, Ryota; Sugiura, Tokuhiro; Matsui, Hirokazu; Kato, Norihiko

    2005-10-01

    Information processing and communication technology are progressing quickly, and are prevailing throughout various technological fields. Therefore, the development of such technology should respond to the needs for improvement of quality in the e-learning education system. The authors propose a new video-image compression processing system that ingeniously employs the features of the lecturing scene: recognizing the a lecturer and a lecture stick by pattern recognition techniques, the video-image compression processing system deletes the figure of a lecturer of low importance and displays only the end point of a lecture stick. It enables us to create the highly compressed lecture video files, which are suitable for the Internet distribution. We compare this technique with the other simple methods such as the lower frame-rate video files, and the ordinary MPEG files. The experimental result shows that the proposed compression processing system is much more effective than the others.

  19. LLNL's Parallel I/O Testing Tools and Techniques for ASC Parallel File Systems

    SciTech Connect

    Loewe, W E; Hedges, R M; McLarty, T T; Morrone, C J

    2004-04-08

    Livermore Computing is an early and aggressive adopter of parallel file systems including, for example, GPFS from IBM and Lustre for our present Linux systems. As such, we have acquired more than our share of battle scars from encountering bugs in 'bleeding edge' file systems that we have pressed into production to serve our customers' massive I/O requirements. A major role of the Scalable I/O Project is to detect errors before our end users do. In order to do this, we have developed highly parallel test codes to stress and probe potentially weak areas of file system behavior. This paper describes those test programs and how we make use of them.

  20. 78 FR 70961 - Notice of Filing of Proposed Settlement Agreement Under the Comprehensive Environmental Response...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-27

    ..., Compensation and Liability Act and the United States Bankruptcy Code On November 21, 2013, the Trustees for the bankruptcy estates of Port Arthur Chemical & Environmental Services, LLC (``PACES'') and CES Environmental Services, Inc. (``CES'') filed a proposed Settlement Agreement with the United States Bankruptcy Court...

  1. NADIR: A prototype system for detecting network and file system abuse

    SciTech Connect

    Hochberg, J.G.; Jackson, K.A.; Stallings, C.A.; McClary, J.F.; DuBois, D.H.; Ford, J.R.

    1992-10-01

    This paper describes the design of a prototype computer misuse detection system for the Los Alamos Notional Laboratory`s Integrated Computing Network (ICN). This automated expert system, the Network Anomaly Detection and Intrusion Reporter (NADIR), streamlines and supplements the manual audit record review traditionally performed by security auditors. NADIR compares network activity, as summarized in weekly profiles of individual users and the ICN as a whole, against expert rules that define security policy, improper or suspicious behavior, and normal user activity. NADIR reports suspicious behavior to security auditors and provides tools to aid in follow-up investigations. This paper describes analysis by NADIR of two types of ICN activity: user authentication and access control, and mass file storage. It highlights system design issues of data handling, exploiting existing auditing systems, and performing audit analysis at the network level.

  2. NADIR: A prototype system for detecting network and file system abuse

    SciTech Connect

    Hochberg, J.G.; Jackson, K.A.; Stallings, C.A.; McClary, J.F.; DuBois, D.H.; Ford, J.R.

    1992-01-01

    This paper describes the design of a prototype computer misuse detection system for the Los Alamos Notional Laboratory's Integrated Computing Network (ICN). This automated expert system, the Network Anomaly Detection and Intrusion Reporter (NADIR), streamlines and supplements the manual audit record review traditionally performed by security auditors. NADIR compares network activity, as summarized in weekly profiles of individual users and the ICN as a whole, against expert rules that define security policy, improper or suspicious behavior, and normal user activity. NADIR reports suspicious behavior to security auditors and provides tools to aid in follow-up investigations. This paper describes analysis by NADIR of two types of ICN activity: user authentication and access control, and mass file storage. It highlights system design issues of data handling, exploiting existing auditing systems, and performing audit analysis at the network level.

  3. 43 CFR 4.1381 - Who may file; when to file; where to file.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... may file; when to file; where to file. (a) Any person who receives a written decision issued by OSM under 30 CFR 773.28 on a challenge to an ownership or control listing or finding may file a request for... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Who may file; when to file; where to...

  4. HLLV avionics requirements study and electronic filing system database development

    NASA Technical Reports Server (NTRS)

    1994-01-01

    This final report provides a summary of achievements and activities performed under Contract NAS8-39215. The contract's objective was to explore a new way of delivering, storing, accessing, and archiving study products and information and to define top level system requirements for Heavy Lift Launch Vehicle (HLLV) avionics that incorporate Vehicle Health Management (VHM). This report includes technical objectives, methods, assumptions, recommendations, sample data, and issues as specified by DPD No. 772, DR-3. The report is organized into two major subsections, one specific to each of the two tasks defined in the Statement of Work: the Index Database Task and the HLLV Avionics Requirements Task. The Index Database Task resulted in the selection and modification of a commercial database software tool to contain the data developed during the HLLV Avionics Requirements Task. All summary information is addressed within each task's section.

  5. A Next-Generation Parallel File System Environment for the OLCF

    SciTech Connect

    Dillow, David A; Fuller, Douglas; Gunasekaran, Raghul; Kim, Youngjae; Oral, H Sarp; Reitz, Doug M; Simmons, James A; Wang, Feiyi; Shipman, Galen M; Hill, Jason J

    2012-01-01

    When deployed in 2008/2009 the Spider system at the Oak Ridge National Laboratory s Leadership Computing Facility (OLCF) was the world s largest scale Lustre parallel file system. Envisioned as a shared parallel file system capable of delivering both the bandwidth and capacity requirements of the OLCF s diverse computational environment, Spider has since become a blueprint for shared Lustre environments deployed worldwide. Designed to support the parallel I/O requirements of the Jaguar XT5 system and other smallerscale platforms at the OLCF, the upgrade to the Titan XK6 heterogeneous system will begin to push the limits of Spider s original design by mid 2013. With a doubling in total system memory and a 10x increase in FLOPS, Titan will require both higher bandwidth and larger total capacity. Our goal is to provide a 4x increase in total I/O bandwidth from over 240GB=sec today to 1TB=sec and a doubling in total capacity. While aggregate bandwidth and total capacity remain important capabilities, an equally important goal in our efforts is dramatically increasing metadata performance, currently the Achilles heel of parallel file systems at leadership. We present in this paper an analysis of our current I/O workloads, our operational experiences with the Spider parallel file systems, the high-level design of our Spider upgrade, and our efforts in developing benchmarks that synthesize our performance requirements based on our workload characterization studies.

  6. 17 CFR 242.608 - Filing and amendment of national market system plans.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... SECURITY FUTURES Regulation Nms-Regulation of the National Market System § 242.608 Filing and amendment of... market system plan shall ensure that a current and complete version of the plan is posted on a plan Web site or on a Web site designated by plan participants within two business days after notification...

  7. Strategic Considerations in the Design of a Screening System for Substructure Searches of Chemical Structure Files

    ERIC Educational Resources Information Center

    Adamson, George W.; And Others

    1973-01-01

    A major problem in the design of screening systems for substructure searches of chemical structure files is the development of a methodology for selection of an optimal set of structural characteristics to act as screens. Distributions of several structural characteristics of the Chemical Abstracts Service Registry System are summarized. (13…

  8. 12 CFR 239.55 - Filing requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 4 2012-01-01 2012-01-01 false Filing requirements. 239.55 Section 239.55 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED) BOARD OF GOVERNORS OF THE FEDERAL RESERVE SYSTEM (CONTINUED) MUTUAL HOLDING COMPANIES (REGULATION MM) Conversions from Mutual to Stock Form § 239.55 Filing requirements. (a) Applications under...

  9. The self-adjusting file (SAF) system: An evidence-based update

    PubMed Central

    Metzger, Zvi

    2014-01-01

    Current rotary file systems are effective tools. Nevertheless, they have two main shortcomings: They are unable to effectively clean and shape oval canals and depend too much on the irrigant to do the cleaning, which is an unrealistic illusionThey may jeopardize the long-term survival of the tooth via unnecessary, excessive removal of sound dentin and creation of micro-cracks in the remaining root dentin. The new Self-adjusting File (SAF) technology uses a hollow, compressible NiTi file, with no central metal core, through which a continuous flow of irrigant is provided throughout the procedure. The SAF technology allows for effective cleaning of all root canals including oval canals, thus allowing for the effective disinfection and obturation of all canal morphologies. This technology uses a new concept of cleaning and shaping in which a uniform layer of dentin is removed from around the entire perimeter of the root canal, thus avoiding unnecessary excessive removal of sound dentin. Furthermore, the mode of action used by this file system does not apply the machining of all root canals to a circular bore, as do all other rotary file systems, and does not cause micro-cracks in the remaining root dentin. The new SAF technology allows for a new concept in cleaning and shaping root canals: Minimally Invasive 3D Endodontics. PMID:25298639

  10. Extending the POSIX I/O interface: a parallel file system perspective.

    SciTech Connect

    Vilayannur, M.; Lang, S.; Ross, R.; Klundt, R.; Ward, L.; Mathematics and Computer Science; VMWare, Inc.; SNL

    2008-12-11

    The POSIX interface does not lend itself well to enabling good performance for high-end applications. Extensions are needed in the POSIX I/O interface so that high-concurrency HPC applications running on top of parallel file systems perform well. This paper presents the rationale, design, and evaluation of a reference implementation of a subset of the POSIX I/O interfaces on a widely used parallel file system (PVFS) on clusters. Experimental results on a set of micro-benchmarks confirm that the extensions to the POSIX interface greatly improve scalability and performance.

  11. A convertor and user interface to import CAD files into worldtoolkit virtual reality systems

    NASA Technical Reports Server (NTRS)

    Wang, Peter Hor-Ching

    1996-01-01

    Virtual Reality (VR) is a rapidly developing human-to-computer interface technology. VR can be considered as a three-dimensional computer-generated Virtual World (VW) which can sense particular aspects of a user's behavior, allow the user to manipulate the objects interactively, and render the VW at real-time accordingly. The user is totally immersed in the virtual world and feel the sense of transforming into that VW. NASA/MSFC Computer Application Virtual Environments (CAVE) has been developing the space-related VR applications since 1990. The VR systems in CAVE lab are based on VPL RB2 system which consists of a VPL RB2 control tower, an LX eyephone, an Isotrak polhemus sensor, two Fastrak polhemus sensors, a folk of Bird sensor, and two VPL DG2 DataGloves. A dynamics animator called Body Electric from VPL is used as the control system to interface with all the input/output devices and to provide the network communications as well as VR programming environment. The RB2 Swivel 3D is used as the modelling program to construct the VW's. A severe limitation of the VPL VR system is the use of RB2 Swivel 3D, which restricts the files to a maximum of 1020 objects and doesn't have the advanced graphics texture mapping. The other limitation is that the VPL VR system is a turn-key system which does not provide the flexibility for user to add new sensors and C language interface. Recently, NASA/MSFC CAVE lab provides VR systems built on Sense8 WorldToolKit (WTK) which is a C library for creating VR development environments. WTK provides device drivers for most of the sensors and eyephones available on the VR market. WTK accepts several CAD file formats, such as Sense8 Neutral File Format, AutoCAD DXF and 3D Studio file format, Wave Front OBJ file format, VideoScape GEO file format, Intergraph EMS stereolithographics and CATIA Stereolithographics STL file formats. WTK functions are object-oriented in their naming convention, are grouped into classes, and provide easy C

  12. 76 FR 14654 - Gulfstream Natural Gas System, L.L.C. Notice of Request Under Blanket Authorization

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-17

    ... Energy Regulatory Commission Gulfstream Natural Gas System, L.L.C. Notice of Request Under Blanket Authorization Take notice that on March 1, 2011, Gulfstream Natural Gas System, L.L.C. (Gulfstream) filed a..., General Manager, Rates and Certificates, Gulfstream Natural Gas System, L.L.C., 5400 Westheimer Court,...

  13. 11 CFR 100.19 - File, filed or filing (2 U.S.C. 434(a)).

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... file electronically under 11 CFR 104.18, may file 24-hour reports using the Commission's website's on... to be filed under 11 CFR parts 101, 102, 104, 105, 107, 108, and 109, and any modifications or... required by 11 CFR part 105, by the close of business on the prescribed filing date. (b) Timely filed....

  14. 11 CFR 100.19 - File, filed or filing (2 U.S.C. 434(a)).

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... file electronically under 11 CFR 104.18, may file 24-hour reports using the Commission's website's on... to be filed under 11 CFR parts 101, 102, 104, 105, 107, 108, and 109, and any modifications or... required by 11 CFR part 105, by the close of business on the prescribed filing date. (b) Timely filed....

  15. The global unified parallel file system (GUPFS) project: FY 2003 activities and results

    SciTech Connect

    Butler, Gregory F.; Baird William P.; Lee, Rei C.; Tull, Craig E.; Welcome, Michael L.; Whitney Cary L.

    2004-04-30

    The Global Unified Parallel File System (GUPFS) project is a multiple-phase project at the National Energy Research Scientific Computing (NERSC) Center whose goal is to provide a scalable, high-performance, high-bandwidth, shared file system for all of the NERSC production computing and support systems. The primary purpose of the GUPFS project is to make the scientific users more productive as they conduct advanced scientific research at NERSC by simplifying the scientists' data management tasks and maximizing storage and data availability. This is to be accomplished through the use of a shared file system providing a unified file namespace, operating on consolidated shared storage that is accessible by all the NERSC production computing and support systems. In order to successfully deploy a scalable high-performance shared file system with consolidated disk storage, three major emerging technologies must be brought together: (1) shared/cluster file systems software, (2) cost-effective, high-performance storage area network (SAN) fabrics, and (3) high-performance storage devices. Although they are evolving rapidly, these emerging technologies individually are not targeted towards the needs of scientific high-performance computing (HPC). The GUPFS project is in the process of assessing these emerging technologies to determine the best combination of solutions for a center-wide shared file system, to encourage the development of these technologies in directions needed for HPC, particularly at NERSC, and to then put them into service. With the development of an evaluation methodology and benchmark suites, and with the updating of the GUPFS testbed system, the project did a substantial number of investigations and evaluations during FY 2003. The investigations and evaluations involved many vendors and products. From our evaluation of these products, we have found that most vendors and many of the products are more focused on the commercial market. Most vendors lack the

  16. Electrochemical Impedance Spectroscopy Investigation on the Clinical Lifetime of ProTaper Rotary File System

    PubMed Central

    Pirvu, Cristian; Demetrescu, Ioana

    2014-01-01

    The main objective of the current paper is to show that electrochemical impedance spectroscopy (EIS) could be a method for evaluating and predicting of ProTaper rotary file system clinical lifespan. This particular aspect of everyday use of the endodontic files is of great importance in each dental practice and has profound clinical implications. The method used for quantification resides in the electrochemical impedance spectroscopy theory and has in its main focus the characteristics of the surface titanium oxide layer. This electrochemical technique has been adapted successfully to identify the quality of the Ni-Ti files oxide layer. The modification of this protective layer induces changes in corrosion behavior of the alloy modifying the impedance value of the file. In order to assess the method, 14 ProTaper sets utilized on different patients in a dental clinic have been submitted for testing using EIS. The information obtained in regard to the surface oxide layer has offered an indication of use and proves that the said layer evolves with each clinical application. The novelty of this research is related to an electrochemical technique successfully adapted for Ni-Ti file investigation and correlation with surface and clinical aspects. PMID:24605336

  17. 17 CFR 242.608 - Filing and amendment of national market system plans.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 17 Commodity and Securities Exchanges 3 2011-04-01 2011-04-01 false Filing and amendment of national market system plans. 242.608 Section 242.608 Commodity and Securities Exchanges SECURITIES AND EXCHANGE COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS...

  18. Binary authentication signatures integrity standard: System file integrity for the masses

    SciTech Connect

    Bartoletti, T.; Graff, M.; Schales, D.

    1994-03-01

    Thrusted software plays a central role in computer security, yet straightforward methods for authentication of installed software are lacking in the marketplace. This paper argues for a vendor-supported standard for the generation and publication of strong digital signature for all vendor-supplied system files. Progress in the design and adoption of a proposed standard is discussed.

  19. AGDEX: A System for Classifying, Indexing, and Filing Agricultural Publications. Revised Edition.

    ERIC Educational Resources Information Center

    Miller, Howard L.; Woodin, Ralph J.

    This document provides an introduction to and instructions for the use of AGDEX, a comprehensive numeric filing system to classify and organize a wide variety of agricultural publications. The index is subdivided and color coded according to the following categories: (1) field crops; (2) horticulture; (3) forestry; (4) animal science; (5) soils;…

  20. 77 FR 15026 - Privacy Act of 1974; Farm Records File (Automated) System of Records

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-14

    ... entity data; Combined producer data; production and marketing data; Lease and transfer of allotments and... shares or interest in a payee entity; Appraisals, leases, and data for farm reconstitution; and For... USDA/FSA-2 System name: Farm Records File (Automated). Security classification: Unclassified....

  1. 17 CFR 242.608 - Filing and amendment of national market system plans.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 17 Commodity and Securities Exchanges 4 2014-04-01 2014-04-01 false Filing and amendment of national market system plans. 242.608 Section 242.608 Commodity and Securities Exchanges SECURITIES AND EXCHANGE COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS FOR SECURITY FUTURES Regulation Nms-Regulation...

  2. 76 FR 4001 - Foreign Trade Regulations (FTR): Mandatory Automated Export System Filing for All Shipments...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-21

    ...The U.S. Census Bureau (Census Bureau) proposes to amend its regulations to reflect new export reporting requirements. Specifically, the Census Bureau is proposing to require mandatory filing of export information through the Automated Export System (AES) or through AESDirect for all shipments of used self-propelled vehicles, temporary exports and household goods. The Census Bureau is also......

  3. Migrant Student Record Transfer System (MSRTS) [machine-readable data file].

    ERIC Educational Resources Information Center

    Arkansas State Dept. of Education, Little Rock. General Education Div.

    The Migrant Student Record Transfer System (MSRTS) machine-readable data file (MRDF) is a collection of education and health data on more than 750,000 migrant children in grades K-12 in the United States (except Hawaii), the District of Columbia, and the outlying territories of Puerto Rico and the Mariana and Marshall Islands. The active file…

  4. Request queues for interactive clients in a shared file system of a parallel computing system

    DOEpatents

    Bent, John M.; Faibish, Sorin

    2015-08-18

    Interactive requests are processed from users of log-in nodes. A metadata server node is provided for use in a file system shared by one or more interactive nodes and one or more batch nodes. The interactive nodes comprise interactive clients to execute interactive tasks and the batch nodes execute batch jobs for one or more batch clients. The metadata server node comprises a virtual machine monitor; an interactive client proxy to store metadata requests from the interactive clients in an interactive client queue; a batch client proxy to store metadata requests from the batch clients in a batch client queue; and a metadata server to store the metadata requests from the interactive client queue and the batch client queue in a metadata queue based on an allocation of resources by the virtual machine monitor. The metadata requests can be prioritized, for example, based on one or more of a predefined policy and predefined rules.

  5. Creating Interactive Graphical Overlays in the Advanced Weather Interactive Processing System Using Shapefiles and DGM Files

    NASA Technical Reports Server (NTRS)

    Barrett, Joe H., III; Lafosse, Richard; Hood, Doris; Hoeth, Brian

    2007-01-01

    Graphical overlays can be created in real-time in the Advanced Weather Interactive Processing System (AWIPS) using shapefiles or Denver AWIPS Risk Reduction and Requirements Evaluation (DARE) Graphics Metafile (DGM) files. This presentation describes how to create graphical overlays on-the-fly for AWIPS, by using two examples of AWIPS applications that were created by the Applied Meteorology Unit (AMU) located at Cape Canaveral Air Force Station (CCAFS), Florida. The first example is the Anvil Threat Corridor Forecast Tool, which produces a shapefile that depicts a graphical threat corridor of the forecast movement of thunderstorm anvil clouds, based on the observed or forecast upper-level winds. This tool is used by the Spaceflight Meteorology Group (SMG) at Johnson Space Center, Texas and 45th Weather Squadron (45 WS) at CCAFS to analyze the threat of natural or space vehicle-triggered lightning over a location. The second example is a launch and landing trajectory tool that produces a DGM file that plots the ground track of space vehicles during launch or landing. The trajectory tool can be used by SMG and the 45 WS forecasters to analyze weather radar imagery along a launch or landing trajectory. The presentation will list the advantages and disadvantages of both file types for creating interactive graphical overlays in future AWIPS applications. Shapefiles are a popular format used extensively in Geographical Information Systems. They are usually used in AWIPS to depict static map backgrounds. A shapefile stores the geometry and attribute information of spatial features in a dataset (ESRI 1998). Shapefiles can contain point, line, and polygon features. Each shapefile contains a main file, index file, and a dBASE table. The main file contains a record for each spatial feature, which describes the feature with a list of its vertices. The index file contains the offset of each record from the beginning of the main file. The dBASE table contains records for each

  6. 77 FR 43592 - System Energy Resources, Inc.; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-25

    ..., 2012, System Energy Resources, Inc. (System Energy Resources), submitted a supplement to its petition... supplement, System Energy Resources supplements its March 28 petition to provide additional information and... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY...

  7. Comparison of the amount of apical debris extrusion associated with different retreatment systems and supplementary file application during retreatment process

    PubMed Central

    Çiçek, Ersan; Koçak, Mustafa Murat; Koçak, Sibel; Sağlam, Baran Can

    2016-01-01

    Background: The type of instrument affects the amount of debris extruded. The aim of this study was to compare the effect of retreatment systems and supplementary file application on the amount of apical debris extrusion. Materials and Methods: Forty-eight extracted mandibular premolars with a single canal and similar length were selected. The root canals were prepared with the ProTaper Universal system with a torque-controlled engine. The root canals were dried and were obturated using Gutta-percha and sealer. The specimens were randomly divided into four equal groups according to the retreatment procedures (Group 1, Mtwo retreatment files; Group 2, Mtwo retreatment files + Mtwo rotary file #30 supplementary file; Group 3, ProTaper Universal retreatment (PTUR) files; and Group 4, PTUR files + ProTaper F3 supplementary file). The extruded debris during instrumentation were collected into preweighed Eppendorf tubes. The amount of apically extruded debris was calculated by subtracting the initial weight of the tube from the final weight. Three consecutive weights were obtained for each tube. Results: No statistically significant difference was found in the amount of apically extruded debris between Groups 1 and 3 (P = 0.590). A significant difference was observed between Groups 1 and 2 (P < 0.05), and between Groups 3 and 4 (P < 0.05). Conclusions: The use of supplementary file significantly increased the amount of apically extruded debris. PMID:27563185

  8. Automated Discovery of Patient-Specific Clinician Information Needs Using Clinical Information System Log Files

    PubMed Central

    Chen, Elizabeth S.; Cimino, James J.

    2003-01-01

    Knowledge about users and their information needs can contribute to better user interface design and organization of information in clinical information systems. This can lead to quicker access to desired information, which may facilitate the decision-making process. Qualitative methods such as interviews, observations and surveys have been commonly used to gain an understanding of clinician information needs. We introduce clinical information system (CIS) log analysis as a method for identifying patient-specific information needs and CIS log mining as an automated technique for discovering such needs in CIS log files. We have applied this method to WebCIS (Web-based Clinical Information System) log files to discover patterns of usage. The results can be used to guide design and development of relevant clinical information systems. This paper discusses the motivation behind the development of this method, describes CIS log analysis and mining, presents preliminary results and summarizes how the results can be applied. PMID:14728151

  9. Endodontic treatment of mandibular molar with root dilaceration using Reciproc single-file system

    PubMed Central

    Meireles, Daniely Amorin; Bastos, Mariana Mena Barreto; Marques, André Augusto Franco; Sponchiado, Emílio Carlos

    2013-01-01

    Biomechanical preparation of root canals with accentuated curvature is challenging. New rotatory systems, such as Reciproc, require a shorter period of time to prepare curved canals, and became a viable alternative for endodontic treatment of teeth with root dilaceration. Thus, this study aimed to report a clinical case of endodontic therapy of root with accentuated dilaceration using Reciproc single-file system. Mandibular right second molar was diagnosed as asymptomatic irreversible pulpitis. Pulp chamber access was performed, and glide path was created with #10 K-file (Dentsply Maillefer) and PathFile #13, #16 and #19 (Dentsply Maillefer) up to the temporary working length. The working length measured corresponded to 20 mm in the mesio-buccal and mesio-lingual canals, and 22 mm in the distal canal. The R25 file (VDW GmbH) was used in all the canals for instrumentation and final preparation, followed by filling with Reciproc gutta-percha cones (VDW GmbH) and AH Plus sealer (Dentsply Maillefer), using thermal compaction technique. The case has been receiving follow-up for 6 mon and no painful symptomatology or periapical lesions have been found. Despite the difficulties, the treatment could be performed in a shorter period of time than the conventional methods. PMID:24010084

  10. Ex Vivo Comparison of Mtwo and RaCe Rotary File Systems in Root Canal Deviation: One File Only versus the Conventional Method

    PubMed Central

    Aminsobhani, Mohsen; Nozari, Solmaz

    2015-01-01

    Objectives: Cleaning and shaping of the root canal system is an important step in endodontic therapy. New instruments incorporate new preparation techniques that can improve the efficacy of cleaning and shaping. The aim of this study was to compare the efficacy of Mtwo and RaCe rotary file systems in straightening the canal curvature using only one file or the conventional method. Materials and Methods: Sixty mesial roots of extracted human mandibular molars were prepared by RaCe and Mtwo nickel-titanium (NiTi) rotary files using the conventional and only one rotary file methods. The working length was 18 mm and the curvatures of the root canals were between 15–45°. By superimposing x-ray images before and after the instrumentation, deviation of the canals was assessed using Adobe Photoshop CS3 software. Preparation time was recorded. Data were analyzed using three-way ANOVA and Tukey’s post hoc test. Results: There were no significant differences between RaCe and Mtwo or between the two root canal preparation methods in root canal deviation in buccolingual and mesiodistal radiographs (P>0.05). Changes of root canal curvature in >35° subgroups were significantly more than in other subgroups with smaller canal curvatures. Preparation time was shorter in one file only technique. Conclusion: According to the results, the two rotary systems and the two root canal preparation methods had equal efficacy in straightening the canals; but the preparation time was shorter in one file only group. PMID:26877736

  11. HPC Global File System Performance Analysis Using A Scientific-Application Derived Benchmark

    SciTech Connect

    Borrill, Julian; Oliker, Leonid; Shalf, John; Shan, Hongzhang; Uselton, Andrew

    2008-08-28

    With the exponential growth of high-fidelity sensor and simulated data, the scientific community is increasingly reliant on ultrascale HPC resources to handle its data analysis requirements. However, to use such extreme computing power effectively, the I/O components must be designed in a balanced fashion, as any architectural bottleneck will quickly render the platform intolerably inefficient. To understand I/O performance of data-intensive applications in realistic computational settings, we develop a lightweight, portable benchmark called MADbench2, which is derived directly from a large-scale Cosmic Microwave Background (CMB) data analysis package. Our study represents one of the most comprehensive I/O analyses of modern parallel file systems, examining a broad range of system architectures and configurations, including Lustre on the Cray XT3, XT4, and Intel Itanium2 clusters; GPFS on IBM Power5 and AMD Opteron platforms; a BlueGene/P installation using GPFS and PVFS2 file systems; and CXFS on the SGI Altix\\-3700. We present extensive synchronous I/O performance data comparing a number of key parameters including concurrency, POSIX- versus MPI-IO, and unique-versus shared-file accesses, using both the default environment as well as highly-tuned I/O parameters. Finally, we explore the potential of asynchronous I/O and show that only the two of the nine evaluated systems benefited from MPI-2's asynchronous MPI-IO. On those systems, experimental results indicate that the computational intensity required to hide I/O effectively is already close to the practical limit of BLAS3 calculations. Overall, our study quantifies vast differences in performance and functionality of parallel file systems across state-of-the-art platforms -- showing I/O rates that vary up to 75x on the examined architectures -- while providing system designers and computational scientists a lightweight tool for conducting further analysis.

  12. A File Allocation Strategy for Energy-Efficient Disk Storage Systems

    SciTech Connect

    Otoo, Ekow J; Otoo, Ekow J.; Rotem, Doron; Pinar, Ali; Tsao, Shi-Chiang

    2008-06-27

    Exponential data growth is a reality for most enterprise and scientific data centers.Improvements in price/performance and storage densities of disks have made it both easy and affordable to maintain most of the data in large disk storage farms. The provisioning of disk storage farms however, is at the expense of high energy consumption due to the large number of spinning disks. The power for spinning the disks and the associated cooling costs is a significant fraction of the total power consumption of a typical data center. Given the trend of rising global fuel and energy prices and the high rate of data growth, the challenge is to implement appropriateconfigurations of large scale disk storage systems that meet performancerequirements for information retrieval across data centers. We present part of the solution to this challenge with an energy efficient file allocation strategy on a large scale disk storage system. Given performance characteristics of thedisks, and a profile of the workload in terms of frequencies of file requests and their sizes, the basic idea is to allocate files to disks such that the disks can be configured into two sets of active (constantly spinning), and passive (capable of being spun up or down) disk pools. The goal is to minimize the number of active disks subject to I/O performance constraints. We present an algorithm for solving this problem with guaranteed bounds from the optimal solution. Our algorithm runs in O(n) time where n is the number of files allocated. It uses a mapping of our file allocation problem to a generalization of the bin packing problem known as 2-dimensional vector packing. Detailed simulation results are also provided.

  13. Chemical Carcinogenesis Research Information System (CCRIS) data bank, 1981-June 1986 (1988 version). Data file

    SciTech Connect

    Cameron, T.P.; Stump, J.M.; Schofield, L.

    1986-01-01

    CCRIS is a scientifically evaluated and fully referenced data bank, developed and maintained by the National Cancer Institute (NCI), containing carcinogenicity, tumor promotion, and mutagenicity test results. Data are derived from the scanning of primary journals, current-awareness tools, and a special core set of sources, including a wide range of NCI reports. Test results have been reviewed by experts in carcinogenesis. CCRIS File Structure: CCRIS data fields are arranged in two broad subject categories plus a category for administrative information: Administrative Information, Substance Identification/Use, Carcinogenicity/Tumor Promotion/Mutagenicity Studies. The three data fields within category 2 and the information contained therein are: Carcinogenicity Studies: Species; Strain/Sex; Route; Dose; Tumor site/Type of lesion; Results; Reference. Tumor Promotion Studies; Species; Strain/Sex; Promoter Route; Target Tissue/Type of Lesion, Promoter Doses, Carcinogen Route; Carcinogen Doses; Reference. Mutagenicity studies: Test System; Strain/Indicator; Metabolic Activation; Method; Dose range; Reference. A new file dictionary has been enclosed that is a result of minor changes to the file structure. All other documentation on file at the NTIS is still applicable.

  14. [Radiological reporting system developed with FileMaker-Pro: cooperation with HIS, RIS, and PACS].

    PubMed

    Kawakami, Satoshi

    2004-03-01

    This article briefly describes our original radiological reporting system. This system was developed with the widely used database software FileMakerPro (ver 5.5). The reporting system can obtain information about patients and examinations from a radiology information system(RIS) by the Open DataBase Connectivity(ODBC) technique. By clicking the button on the reporting system, the corresponding DICOM images can be displayed on a picture archiving and communication system(PACS) workstation monitor. Reference images in JPEG format can be easily moved from PACS to the reporting system. Reports produced by the reporting system are distributed to the hospital information system(HIS) in Portable Document Format(PDF), through another web server. By utilizing the capacity of FileMakerPro, the human-machine interface of the system has been able to be improved easily. In addition, cooperation with HIS, RIS, and PACS could be constructed. Therefore, this original system would contribute to increasing the efficiency of radiological diagnosis. PMID:15148786

  15. A design for a new catalog manager and associated file management for the Land Analysis System (LAS)

    NASA Technical Reports Server (NTRS)

    Greenhagen, Cheryl

    1986-01-01

    Due to the larger number of different types of files used in an image processing system, a mechanism for file management beyond the bounds of typical operating systems is necessary. The Transportable Applications Executive (TAE) Catalog Manager was written to meet this need. Land Analysis System (LAS) users at the EROS Data Center (EDC) encountered some problems in using the TAE catalog manager, including catalog corruption, networking difficulties, and lack of a reliable tape storage and retrieval capability. These problems, coupled with the complexity of the TAE catalog manager, led to the decision to design a new file management system for LAS, tailored to the needs of the EDC user community. This design effort, which addressed catalog management, label services, associated data management, and enhancements to LAS applications, is described. The new file management design will provide many benefits including improved system integration, increased flexibility, enhanced reliability, enhanced portability, improved performance, and improved maintainability.

  16. Endodontic Treatment of Hypertaurodontic Mandibular Molar Using Reciprocating Single-file System: A Case Report.

    PubMed

    C do Nascimento, Adriano; A F Marques, André; C Sponchiado-Júnior, Emílio; F R Garcia, Lucas; M A de Carvalho, Fredson

    2016-01-01

    Taurodontism is a developmental tooth disorder characterized by lack of constriction in the cementoenamel junction and consequent vertical stretch of the pulp chamber, accompanied by apical displacement of the pulpal floor. The endodontic treatment of teeth with this type of morpho-anatomical anomaly is challenging. The purpose of this article is to report the successful endodontic treatment of a hypertaurodontic mandibular molar using a reciprocating single-file system. PMID:27320297

  17. U.S. Department of Energy Best Practices Workshop onFile Systems & Archives San Francisco, CA September 26-27, 2011 Position Paper

    SciTech Connect

    Hedges, R M

    2011-09-01

    This position paper discusses issues of usability of the large parallel file systems in the Livermore Computing Center. The primary uses of these file systems are for storage and access of data that is created during the course of a simulation running on an LC system. The Livermore Computing Center has multiple, globally mounted parallel file systems in each of its computing environments. The single biggest issue of file system usability that we have encountered through the years is to maintain continuous file system responsiveness. Given the back end storage hardware that our file systems are provisioned with, it is easily possible for a particularly I/O intensive application or one with particularly inefficiently coded I/O operations to bring the file system to an apparent halt. The practice that we will be addressing is one of having an ability to indentify, diagnose, analyze and optimize the I/O quickly and effectively.

  18. Log-Less Metadata Management on Metadata Server for Parallel File Systems

    PubMed Central

    Xiao, Guoqiang; Peng, Xiaoning

    2014-01-01

    This paper presents a novel metadata management mechanism on the metadata server (MDS) for parallel and distributed file systems. In this technique, the client file system backs up the sent metadata requests, which have been handled by the metadata server, so that the MDS does not need to log metadata changes to nonvolatile storage for achieving highly available metadata service, as well as better performance improvement in metadata processing. As the client file system backs up certain sent metadata requests in its memory, the overhead for handling these backup requests is much smaller than that brought by the metadata server, while it adopts logging or journaling to yield highly available metadata service. The experimental results show that this newly proposed mechanism can significantly improve the speed of metadata processing and render a better I/O data throughput, in contrast to conventional metadata management schemes, that is, logging or journaling on MDS. Besides, a complete metadata recovery can be achieved by replaying the backup logs cached by all involved clients, when the metadata server has crashed or gone into nonoperational state exceptionally. PMID:24892093

  19. Shaping Ability of Single-file Systems with Different Movements: A Micro-computed Tomographic Study

    PubMed Central

    Santa-Rosa, Joedy; de Sousa-Neto, Manoel Damião; Versiani, Marco Aurelio; Nevares, Giselle; Xavier, Felipe; Romeiro, Kaline; Cassimiro, Marcely; Leoni, Graziela Bianchi; de Menezes, Rebeca Ferraz; Albuquerque, Diana

    2016-01-01

    Introduction: This study aimed to perform a rigorous sample standardization and also evaluate the preparation of mesiobuccal (MB) root canals of maxillary molars with severe curvatures using two single-file engine-driven systems (WaveOne with reciprocating motion and OneShape with rotary movement), using micro-computed tomography (micro-CT). Methods and Materials: Ten MB roots with single canals were included, uniformly distributed into two groups (n=5). The samples were prepared with a WaveOne or OneShape files. The shaping ability and amount of canal transportation were assessed by a comparison of the pre- and post-instrumentation micro-CT scans. The Kolmogorov-Smirnov and t-tests were used for statistical analysis. The level of significance was set at 0.05. Results: Instrumentation of canals increased their surface area and volume. Canal transportation occurred in coronal, middle and apical thirds and no statistical difference was observed between the two systems (P>0.05). In apical third, significant differences were found between groups in canal roundness (in 3 mm level) and perimeter (in 3 and 4 mm levels) (P<0.05). Conclusion: The WaveOne and One Shape single-file systems were able to shape curved root canals, producing minor changes in the canal curvature. PMID:27471537

  20. Histological evaluation of the cleaning effectiveness of two reciprocating single-file systems in severely curved root canals: Reciproc versus WaveOne

    PubMed Central

    Carvalho, Maira de Souza; Junior, Emílio Carlos Sponchiado; Bitencourt Garrido, Angela Delfina; Roberti Garcia, Lucas da Fonseca; Franco Marques, André Augusto

    2015-01-01

    Objective: The aim of this study was to evaluate the cleaning effectiveness achieved with two reciprocating single-file systems in severely curved root canals: Reciproc and WaveOne. Materials and Methods: Twenty-five mesial roots of mandibular molars were randomly separated into two groups, according to the instrumentation system used. The negative control group consisted of five specimens that were not instrumented. The mesial canals (buccal and lingual) in Reciproc Group were instrumented with file R25 and the WaveOne group with the Primary file. The samples were submitted to histological processing and analyzed under a digital microscope. Results: The WaveOne group presented a larger amount of debris than the Reciproc Group, however, without statistically significant difference (P > 0.05). A larger amount of debris in the control group was observed, with statistically significant difference to Reciproc and WaveOne groups (P < 0.05). Conclusions: The two reciprocating single-file instrumentation systems presented similar effectiveness for root canal cleaning. PMID:25713489

  1. Architecture of scalability file system for meteorological observation data storing

    NASA Astrophysics Data System (ADS)

    Botygin, I. A.; Popov, V. N.; Tartakovsky, V. A.; Sherstnev, V. S.

    2015-11-01

    The approach allows to organize distributed storage of large amounts of diverse data in order to further their parallel processing in high performance cluster systems for problems of climatic processes analysis and forecasting. For different classes of data was used the practice of using meta descriptions - like formalism associated with certain categories of resources. Development of a metadata component was made based on an analysis of data of surface meteorological observations, atmosphere vertical sounding, atmosphere wind sounding, weather radar observing, observations from satellites and others. A common set of metadata components was formed for their general description. The structure and content of the main components of a generalized meta descriptions are presented in detail on the example of reporting meteorological observations from land and sea stations.

  2. Development of a medical image filing system based on superhigh-definition image and its functional evaluation

    NASA Astrophysics Data System (ADS)

    Takeda, Hiroshi; Matsumura, Yasushi; Okada, Takeo; Kuwata, Shigeki; Wada, Minoru; Hashimoto, Tsutomu

    1997-05-01

    Although many images are handled in the medical filed, image monitoring deices and filing methods vary due to differences in resolution and pixel depth. If a system enabling such images to be filed synthetically without losing its quality were to exist, and if retrieval of such images were made easily, such a system could be applied in various ways. In order to determine whether a super high definition (SHD) image system running at a series of 2048 resolution X 2048 line X 60 frame/sec was capable of such purposes, we established a filing system for medical images on this system. All images of various types produced form one case of cardiovascular disease were digitized and registered into this filing system. Images consisted of plain chest x-ray, electrocardiogram, ultrasound cardiogram, cardiac scintigram, coronary angiogram, left ventriculogram and so on. All images were animated and totaled a number of 243. We prepared a graphic user interface for image retrieval based on the medical events and modalities. Twenty one cardiac specialists evaluated quality of the SHD images to be somewhat poor compared to the original pictures but sufficient for making diagnoses, and effective as a tool for teaching and case study group purposes because of its operability of the retrieval system. The system capability of simultaneously displaying several animated images was especially deemed effective in grasping comprehension of diagnosis. efficient input methods, and creating a capacity of filing all produced images are future issue.

  3. 76 FR 9780 - Notification of Deletion of System of Records; EPA Parking Control Office File (EPA-10) and EPA...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-22

    ... EPA Parking Control Office File (EPA-10), published in the Federal Register on January 25, 1978 (43 FR... into the Office of Administrative Services Information System (OASIS) (EPA-41). DATES: This notice...

  4. 76 FR 24522 - Notice of Filing of Settlement Agreement Under the Comprehensive Environmental Response...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-02

    ... and Remedial Action at the Brantley Landfill Site, located in Island, McLean County, Kentucky, issued...'') for reimbursement of response costs incurred or to be incurred by EPA at the Halaco Superfund Site... Halaco Site as a generator of hazardous wastes disposed of at the Site. Under the Settlement...

  5. Computer printing and filing of microbiology reports. 1. Description of the system.

    PubMed Central

    Goodwin, C S; Smith, B C

    1976-01-01

    From March 1974 all reports from this microbiology department have been computer printed and filed. The system was designed to include every medically important microorganism and test. Technicians at the laboratory bench made their results computer-readable using Port-a-punch cards, and specimen details were recorded on paper-tape, allowing the full description of each specimen to appear on the report. A summary form of each microbiology phrase enabled copies of reports to be printed on wide paper with 12 to 18 reports per sheet; such copies, in alphabetical order for one day, and cumulatively for one week were used by staff answering enquiries to the office. This format could also be used for printing allthe reports for one patient. Retrieval of results from the files was easily performed and was useful to medical and laboratory staff and for control-of-infection purposes. The system was written in COBOL and was designed to be as cost-effective as possible without sacrificing accuracy; the cost of a report and its filing was 17-97 pence. Images PMID:939809

  6. Integrated Risk Information System (IRIS), (Volume 4, Issue 3) (for microcomputers). Data file

    SciTech Connect

    Not Available

    1991-07-01

    The Integrated Risk Information System (IRIS) provides information on how chemicals affect human health and is a primary source of Environmental Protection Agency (EPA) risk assessment information on chemicals of environmental concern. It serves as a guide for the hazard identification and dose-response assessment steps of EPA risk assessments. IRIS makes chemical-specific risk information readily available to those who must perform risk assessments and also increases consistency in risk management decisions. The principal section of IRIS is the chemical files. The chemical files contain: oral reference doses (RfD) and inhalation reference concentrations (RfC) for noncarcinogens; oral and inhalation carcinogen assessments; summarized Drinking Water Health Advisories; summaries of selected EPA regulations; supplementary data; and full bibliographic citations. The primary types of health assessment information in IRIS are oral RfDs, inhalation RfCs and carcinogen assessments. There are currently over 450 chemicals in IRIS.

  7. Resource Conservation and Recovery Information System (RCRIS) extract tape. Data file

    SciTech Connect

    Not Available

    1992-01-01

    The file contains data compiled for the Resource Conservation and Recovery Act, using the Resource Conservation and Recovery Information System (RCRIS) database. Notification of Regulated Waste Activity, EPA Form 8700-12 was used to collect the data. The file was updated with information compiled from the Application for a Hazardous Waste Permit-Part A, EPA form 8700-23. The data includes each facility name, EPA Identification number, addresses, owner and operator information, facility contact name and phone number. The data also indicate whether a facility is a generator, treatment/storer/disposer, and/or transporter of hazardous waste. Also included is a listing of wastes handled, taken from 40CFR Pt. 261, SIC codes, Permit Process Codes, Permit Issuance data, and non-sensitive compliance and enforcement data.

  8. Hazardous-Waste Data Management System (HWDMS) extract tape. Data file

    SciTech Connect

    Not Available

    1990-09-30

    The file contains data compiled for the Resource Conservation Recovery Act. Notification of Regulated Waste Activity, EPA Form 8700-12 was used to collect the data. The file was updated with information compiled from the Application for a Hazardous Waste Permit-Part A, EPA Form 8700-23. Hazardous Waste Data Management System (HWDMS) contains data on approximately 4,700 treatment, storage and disposal facilities (TSDs), approximately 20,000 transporters and approximately 276,000 large and small quantity generators. The data indicate whether a facility is a generator, treatment/storer/disposer, and/or transporter of hazardous waste. Information stored in the database includes: A listing of code numbers of waste handled taken from 40CFR Part 261, Facility Name, EPA Identification Number, Addresses, Owner and Operator Information, Facility Contact Name and Phone Number, SIC Codes, RCRA Waste Codes handled, Permit Process Codes and Permit Issuance Data.

  9. 11 CFR 100.19 - File, filed or filing (2 U.S.C. 434(a)).

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... file electronically under 11 CFR 104.18, may file 24-hour reports using the Commission's website's on... to be filed under 11 CFR parts 101, 102, 104, 105, 107, 108, and 109, and any modifications or...., Washington, DC 20510 as required by 11 CFR part 105, by the close of business on the prescribed filing...

  10. Management of the Israeli National Water System under Uncertainty

    NASA Astrophysics Data System (ADS)

    Shamir, U.; Housh, M.; Ostfeld, A.; Zaide, M.

    2009-12-01

    Uncertainty in our region is due to the natural variability of hydrological patterns, with recurring extended droughts, reduced average and broadening variability of recharge that seem to indicate the effect of climate change, as well as to deterioration of water quality in the natural sources, to population growth and distribution, to shifting demand patterns among consumer sectors, and to expected future regional water agreements. These factors combine to create a challenging environment in which highly stressed water resources and water systems have to be developed, operated and managed. The natural sources have been used to their sustainable capacity and often beyond. The main policy responses are a shift of fresh water from agriculture to the cities, replacing it with treated wastewater for irrigation, and a major program for construction of sea-water desalination plants and the associated infrastructure needed for its integration into the supply systems. Organizational reforms, regulation, and demand management options are also being developed, including full-cost pricing. Management of the water resources and systems under these conditions requires a long-term perspective. The methodologies for supporting management decisions that have been used to date by the Israeli Water Authority include evaluation by scenarios, simulation, and optimization with sensitivity analysis. We review existing approaches and models for management of the Israeli water system (Zaide 2006) and then present some new methodologies for addressing operational decisions under hydrological uncertainty, which include generation of tradeoffs between the expected value and variability of the outcomes, and an Info-Gap (Ben-Haim 2006) based approach. These methodologies are demonstrated on examples that emulate portions of a regional water system and are then applied to the Israeli National Water System. Ben-Haim, Y. (2006) Info-Gap Theory: Decisions under Severe Uncertainty, 2nd Ed