No, sorry -- there are no "buffered" variants of the MPI_FILE_* functions like there are with point-to-point communications. So when you do MPI_FILE_WRITE (for example), it'll be directly using the buffer that you pass to it (which is almost always what you want, anyway -- "buffered" modes of communication just force an extra copy, and therefore potentially lower performance).
That being said, if you need an extra copy so that you can start a non-blocking file operation and then free the old buffer, then you can make a copy yourself and allow the original buffer to be freed. On Dec 17, 2009, at 6:25 AM, Ricardo Reis wrote: > > Hi all > > I have a doubt. I'm starting using MPI-IO and was wondering if I can use > the MPI_BUFFER_ATTACH to provide the necessary IO buffer (or will it use > the array I'm passing the MPI_Write...??) > > many thanks, > > Ricardo Reis > > 'Non Serviam' > > PhD candidate @ Lasef > Computational Fluid Dynamics, High Performance Computing, Turbulence > http://www.lasef.ist.utl.pt > > Cultural Instigator @ Rádio Zero > http://www.radiozero.pt > > Keep them Flying! Ajude a/help Aero Fénix! > > http://www.aeronauta.com/aero.fenix > > http://www.flickr.com/photos/rreis/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Squyres jsquy...@cisco.com
