On 09/26/2016 11:15 AM, Pramod Kumbhar wrote:

On Tue, Feb 9, 2016 at 12:48 AM, pramod kumbhar <[email protected] <mailto:[email protected]>> wrote:

Hello All,

I am testing MPI_FIle_write_all_begin/_end and it seems like MPI_File_write_all_begin waits for i/o completion.

Could someone confirm the implementation of these routines?

that's right. ROMIO's split-collective implementation does not actually do any I/O in the background. You might find the non-blocking collective I/O routines, implemented in MPICH-3.2. or newer, a better fit for your use case? http://press3.mcs.anl.gov/romio/2015/05/06/non-blocking-collective-io/ ==rob

Thanks, Pramod

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