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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Multiple-Level MPI File Write-Back and Prefetching for Blue Gene Systems
verfasst von : Javier García Blas, Florin Isailă, J. Carretero, Robert Latham, Robert Ross
Erschienen in: Recent Advances in Parallel Virtual Machine and Message Passing Interface
Verlag: Springer Berlin Heidelberg
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This paper presents the design and implementation of an asynchronous data-staging strategy for file accesses based on ROMIO, the most popular MPI-IO distribution, and ZeptoOS, an open source operating system solution for Blue Gene systems. We describe and evaluate a two-level file write-back implementation and a one-level prefetching solution. The experimental results demonstrate that both solutions achieve high performance through a high degree of overlap between computation, communication, and file I/O.