Implementation and Evaluation of an MPI-IO Interface for GPFS in ROMIO

  • Authors:
  • Francisco Javier Blas;Florin Isailă;Jesús Carretero;Thomas Großmann

  • Affiliations:
  • University Carlos III, Spain;University Carlos III, Spain;University Carlos III, Spain;High Performance Computing Center Stuttgart (HLRS),

  • Venue:
  • Proceedings of the 15th European PVM/MPI Users' Group Meeting on Recent Advances in Parallel Virtual Machine and Message Passing Interface
  • Year:
  • 2008

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Abstract

This paper presents an implementation of the MPI-IO interface for GPFS inside ROMIO distribution. The experimental section presents a performance comparison among three collective I/O implementations: two-phase I/O, the default file system independent method of ROMIO, view-based I/O, a file system-independent method we developed in a previous work and a GPFS specific collective I/O implementation based on data-shipping. The results show that data shipping-based collective I/O performs better for writing, while view-based I/O for reading.