By the same authors

LDPLFS: Improving I/O performance without application modification

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Author(s)

  • S. A. Wright
  • S. D. Hammond
  • S. J. Pennycook
  • I. Miller
  • J. A. Herdman
  • S. A. Jarvis

Department/unit(s)

Publication details

Title of host publicationProceedings of the 2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops, IPDPSW 2012
DatePublished - 18 Oct 2012
Pages1352-1359
Number of pages8
Original languageEnglish

Abstract

Input/Output (I/O) operations can represent a significant proportion of run-time when large scientific applications are run in parallel and at scale. In order to address the growing divergence between processing speeds and I/O performance, the Parallel Log-structured File System (PLFS) has been developed by EMC Corporation and the Los Alamos National Laboratory (LANL) to improve the performance of parallel file activities. Currently, PLFS requires the use of either (i) the FUSE Linux Kernel module, (ii) a modified MPI library with a customised ROMIO MPI-IO library, or (iii) an application rewrite to utilise the PLFS API directly. In this paper we present an alternative method of utilising PLFS in applications. This method employs a dynamic library to intercept the low-level POSIX operations and retarget them to use the equivalents offered by PLFS. We demonstrate our implementation of this approach, named LDPLFS, on a set of standard UNIX tools, as well on as a set of standard parallel I/O intensive mini-applications. The results demonstrate almost equivalent performance to a modified build of ROMIO and improvements over the FUSE-based approach. Furthermore, through our experiments we demonstrate decreased performance in PLFS when ran at scale on the Lustre file system.

Bibliographical note

© IEEE, 2012. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

    Research areas

  • Data Storage Systems, File Systems, High Performance Computing, I/O

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