>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 does this? And, what is ROMIO? Where can i find any informations? Thanks a lot! 2008/7/23 Jeff Squyres <jsquy...@cisco.com>: > 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 > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > -- Gabriele Fatigati CINECA Systems & Tecnologies Department Supercomputing Group Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy www.cineca.it Tel: +39 051 6171722 g.fatig...@cineca.it
