Remote I/O : fast access to distant storage.

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As high-speed networks make it easier to use distributed resources, it becomes increasingly common that applications and their data are not colocated. Users have traditionally addressed this problem by manually staging data to and from remote computers. We argue instead for a new remote I/O paradigm in which programs use familiar parallel I/O interfaces to access remote file systems. In addition to simplifying remote execution, remote I/O can improve performance relative to staging by overlapping computation and data transfer or by reducing communication requirements. However, remote I/O also introduces new technical challenges in the areas of portability, performance, and integration ... continued below

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14 p.

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Foster, I.; Kohr, D., Jr.; Krishnaiyer, R. & Mogill, J. December 17, 1997.

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Description

As high-speed networks make it easier to use distributed resources, it becomes increasingly common that applications and their data are not colocated. Users have traditionally addressed this problem by manually staging data to and from remote computers. We argue instead for a new remote I/O paradigm in which programs use familiar parallel I/O interfaces to access remote file systems. In addition to simplifying remote execution, remote I/O can improve performance relative to staging by overlapping computation and data transfer or by reducing communication requirements. However, remote I/O also introduces new technical challenges in the areas of portability, performance, and integration with distributed computing systems. We propose techniques designed to address these challenges and describe a remote I/O library called RIO that we have developed to evaluate the effectiveness of these techniques. RIO addresses issues of portability by adopting the quasi-standard MPI-IO interface and by defining a RIO device and RIO server within the ADIO abstract I/O device architecture. It addresses performance issues by providing traditional I/O optimizations such as asynchronous operations and through implementation techniques such as buffering and message forwarding to off load communication overheads. RIO uses the Nexus communication library to obtain access to configuration and security mechanisms provided by the Globus wide area computing tool kit. Microbenchmarks and application experiments demonstrate that our techniques achieve acceptable performance in most situations and can improve turnaround time relative to staging.

Physical Description

14 p.

Notes

OSTI as DE00008920

Medium: P; Size: 14 pages

Source

  • IOPADS '97 (5th Workshop on I/O in Parallel and Distributed Systems), San Jose, CA (US), 11/17/1997

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  • Report No.: ANL/MCS/CP-95133
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 8920
  • Archival Resource Key: ark:/67531/metadc791541

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • December 17, 1997

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 7, 2017, 2:40 p.m.

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Foster, I.; Kohr, D., Jr.; Krishnaiyer, R. & Mogill, J. Remote I/O : fast access to distant storage., article, December 17, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc791541/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.