MPI - IO - Prace Training Portal
MPI - IO - Prace Training Portal
MPI - IO - Prace Training Portal
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Two phase collective buffering• First phase: Access is performed by a group of processes (aggregators)• Second phase: Data is moved to final destinationsrelative ROM<strong>IO</strong> hints:romio_cb_writeromio_cb_readcb_buffer_sizecb_nodesdetermine whether collective buffering will beperformed for writes and reads(values: enable, disable, auto)controls the size of the intermediate buffer usedin two phase collective I/O in bytescontrols the maximum number of aggregators tobe used
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