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2003
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Scalable Implementations of MPI Atomicity for Concurrent Overlapping I/O

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Scalable Implementations of MPI Atomicity for Concurrent Overlapping I/O
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.
Wei-keng Liao, Alok N. Choudhary, Kenin Coloma, Ge
Added 04 Jul 2010
Updated 04 Jul 2010
Type Conference
Year 2003
Where ICPP
Authors Wei-keng Liao, Alok N. Choudhary, Kenin Coloma, George K. Thiruvathukal, Lee Ward, Eric Russell, Neil Pundit
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