Parallel simulation of parallel file systems and I/O programs

  • Authors:
  • Rajive Bagrodia;Stephen Docy;Andy Kahn

  • Affiliations:
  • University of California, Los Angeles, CA;University of California, Los Angeles, CA;University of California, Los Angeles, CA

  • Venue:
  • SC '97 Proceedings of the 1997 ACM/IEEE conference on Supercomputing
  • Year:
  • 1997

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Abstract

Efficient I/O implementations can have a significant impact on the performance of parallel applications. This paper describes the design and implementation of PIOSIM, a parallel simulation library for MPI-IO programs. The simulator can be used to predict the performance of existing MPI-IO programs as a function of architectural characteristics, caching algorithms, and alternative implementations of collective I/O operations. This paper describes the simulator and presents the results of a number of performance studies to evaluate the impact of the preceding factors on a set of MPI-IO benchmarks, including programs from the NAS benchmark suite.