RoMio, a representative MPi-ioimplementation, has been widely used in recent large-scale parallel computations. The two-phasei/ooptimizationschemeof RoMioimproves i/o performance for non-contiguous access patter...
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ISBN:
(纸本)9781479927289
RoMio, a representative MPi-ioimplementation, has been widely used in recent large-scale parallel computations. The two-phasei/ooptimizationschemeof RoMioimproves i/o performance for non-contiguous access patterns;however, this scheme still has room toimprove performance to make it suitable for recent data-intensive computing. We propose overlapping data exchange operations with file i/ooperations by using a multithreadedscheme to achieve further i/o throughput improvement. We show up to 60% improvement by the multithreadedtwo-phasei/o relative to the original two-phasei/oin performance evaluation of collective write operations on a Lustre file system of a Linux PC cluster.
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