The subgroup method for collective i/o

Authors:
Kwangho Cha;Taeyoung Hong;Jeongwoo Hong
Affiliations:
Supercomputing Center, Korea Institute of Science and Technology Information, Daejon, Korea;Supercomputing Center, Korea Institute of Science and Technology Information, Daejon, Korea;Supercomputing Center, Korea Institute of Science and Technology Information, Daejon, Korea
Venue:
PDCAT'04 Proceedings of the 5th international conference on Parallel and Distributed Computing: applications and Technologies
Year:
2004

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Abstract

Because many scientific applications require large data processing, the importance of parallel I/O has been increasingly recognized. For collective I/O, one of the considerable features of parallel I/O, we suggest the subgroup method. It is the way of using collective I/O of MPI effectively in terms of application programs. From the experimental results, we could conclude that the subgroup method for collective I/O is more efficient than plain collective I/O.