On Jul 23, 2008, at 6:35 AM, Gabriele Fatigati wrote:Open MPI builds ROMIO by default; there's no real distinction between MPI-1 features and MPI-2 features in the Open MPI code base.
>There is a whole chapter in the MPI standard about file I/O operations. I'm quite confident you will find whatever you're looking for there :)
Hi George, i know this chapter :) But i'm using MPI-1, not MPI-2. I would like to know methods for I/O with MPI-1.
You could always effect your own parallel IO (e.g., use MPI sends and receives to coordinate parallel reads and writes), but why? It's already done in the MPI-IO implementation.
FWIW: I do not believe that flock() is guaranteed to be safe across network filesystems such as NFS.
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