ROMio, a representative mpi-io implementation, has been widely used in recent large-scale parallel computations. The two-phase I/O optimization scheme of ROMio improves I/O performance for non-contiguous access patter...
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ISBN:
(纸本)9781479927289
ROMio, a representative mpi-io implementation, has been widely used in recent large-scale parallel computations. The two-phase I/O optimization scheme of ROMio improves I/O performance for non-contiguous access patterns;however, this scheme still has room to improve performance to make it suitable for recent data-intensive computing. We propose overlapping data exchange operations with file I/O operations by using a multithreaded scheme to achieve further I/O throughput improvement. We show up to 60% improvement by the multithreaded two-phase I/O relative to the original two-phase I/O in performance evaluation of collective write operations on a Lustre file system of a Linux PC cluster.
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