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Published Articles >> Table of Contents >> Abstract
2003 International Conference on Parallel Processing (ICPP'03)
p. 239
Scalable Implementations of MPI Atomicity for Concurrent Overlapping I/O
Wei-keng Liao, Northwestern University
Alok Choudhary, Northwestern University
Kenin Coloma, Northwestern University
George K. Thiruvathukal, Loyola University
Lee Ward, Sandia National Laboratories
Eric Russell, Sandia National Laboratories
Neil Pundit, Sandia National Laboratories
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/ICPP.2003.1240586
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For concurrent I/O operations, atomicity defines the results in the overlapping file regions simultaneously read/written by requesting processes. Atomicity has been well studied at the file system level, such as POSIX standard. In this paper, we investigate the problems arising from the implementation of MPI atomicity for concurrent overlapping write access and provide two programming solutions. Since the MPI definition of atomicity differs from the POSIX one, an implementation that simply relies on the POSIX file systems does not guarantee correct MPI semantics. To have a correct implementation of atomic I/O in MPI, we examine the efficiency of three approaches: 1) file locking, 2) graph-coloring, and 3) process-rank ordering. Performance complexity for these methods are analyzed and their experimental results are presented for file systems including NFS, SGI’s XFS, and IBM’s GPFS.
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Citation:
Wei-keng Liao, Alok Choudhary, Kenin Coloma, George K. Thiruvathukal, Lee Ward, Eric Russell, Neil Pundit,
"Scalable Implementations of MPI Atomicity for Concurrent Overlapping I/O,"
icpp,
p. 239,
2003 International Conference on Parallel Processing (ICPP'03),
2003
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