[Beowulf] MPI_File experience???
kums at mpi-softtech.com
Sun Jan 25 13:23:00 EST 2004
If your application is such that only root process performs file
I/O and distributes raw data/ aggregates processed data to/from
other processes, its recommended to shift to the MPI-2 model and use
MPI-IO interface to perform file I/O. In order to gain performance from
the MPI-IO non-blocking I/O interface, the middleware/implementation needs
to as well have a good asynchronous model. Please read the following for
You should be able to find sample MPI-IO codes and other information in
the following website:
Hope this helps.
On Sat, 24 Jan 2004, ambrose lewis wrote:
> Hi All:
> I have a small cluster running a remote sensing code.
> I'm using MPICH on top of Mac OS X.
> Right now, my parallel performance isn't so great,
> because my communication time is far outweighing my
> Does anybody have experience/suggestions/lessons
> learned about using the various MPI-IO routines???
> I'm particularly interesting in learning more about
> successful use of the non-blocking read and write
> Any pointers to sample codes would be greatly
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