>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.
Just a moment: you're saying that i can do fwrite without any lock? OpenMPI
And, what is ROMIO? Where can i find any informations?
Thanks a lot!
2008/7/23 Jeff Squyres <jsquyres_at_[hidden]>:
> On Jul 23, 2008, at 6:35 AM, Gabriele Fatigati wrote:
> >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.
> 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.
> 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.
> Jeff Squyres
> Cisco Systems
> users mailing list
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