A prefetching prototype for the parallel file system on the paragon

Meenakshi Artmachalam, Alok Choudhary, Brad Rullman

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

7 Scopus citations

Abstract

The initial performance results for the file systems demonstrate that the file system performance is scalable. The access bandwidth seen by the user when using prefetching is also scalable, and given a reasonable overlap between computation and I/O, the benefits from the system prefetching can be very significant. Given that in the normal mode of operation (without prefetching), the data is directly transferred into user's buffer, while in the system level prefetching the data is buffered, performance with prefetching is comparable when there is no overlap of I/O with computation. We also compared the performance of system level prefetching with the explicit prefetching at the user level where the knowledge of what and when to prefetch is known. We observed that the system level prefetching performance of comparable to that of user level prefetching despite an extra level of buffering in the former. That demonstrates that the prefetching prototype's performance is not much below the level expected in the best case. In any such implementation in a large-scale software, there are a large number of parameters that can be studied and need to be evaluated. As a part of the future work, we plan to evaluate the performance of prefetching on much larger systems and study the performance for a greater variety of workloads and access patterns. Furthermore, we plan to implement prefetching in other file I/O modes.

Original languageEnglish (US)
Title of host publicationProceedings of the 1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995
EditorsBlaine D. Gaither
PublisherAssociation for Computing Machinery, Inc
Pages321-323
Number of pages3
ISBN (Electronic)0897916956, 9780897916950
DOIs
StatePublished - May 1 1995
Event1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995 - Ottawa, Canada
Duration: May 15 1995May 19 1995

Other

Other1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995
Country/TerritoryCanada
CityOttawa
Period5/15/955/19/95

ASJC Scopus subject areas

  • Hardware and Architecture
  • Software
  • Computer Networks and Communications
  • Computational Theory and Mathematics

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