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Fifth IEEE International Conference on Cluster Computing (CLUSTER'03)
View I/O: Improving the Performance of Non-Contiguous I/O
Hong Kong
December 01-December 04
ISBN: 0-7695-2066-9
Florin Isaila, University of Karlsruhe
Walter F. Tichy, University of Karlsruhe
This paper presents view I/O, a non-contiguous parallel I/O technique. We show that the linear file model may be an unsuitable abstraction for non-contiguous I/O optimizations. Additionally, the poor cooperation between a file system and an I/O library like MPI-IO may drastically affect the performance. View I/O has detailed knowledge about parallel structure of a file and about the potential access pattern and exploits it in order to improve performance. The access overhead is reduced by using a strategy "declare once, use several times" and by file off-set compaction. We compare and contrast view I/O with other non-contiguous I/O methods. Our measurements on a cluster of computers indicate a significant performance improvement over other approaches.
Citation:
Florin Isaila, Walter F. Tichy, "View I/O: Improving the Performance of Non-Contiguous I/O," cluster, pp.336, Fifth IEEE International Conference on Cluster Computing (CLUSTER'03), 2003
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