Multiple-Level MPI File Write-Back and Prefetching for Blue Gene Systems

* Final gross prices may vary according to local VAT.

Get Access


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.