On Mon, Nov 10, 2008 at 09:24:56AM +0800, [EMAIL PROTECTED] wrote: > Hi, > > I have installed pvfs2 successfully on my system. My purpose is to > gain high performence, with coding within MPI environment. But how > can I specify the parameter of file name of MPI_File_open(). If I > specify the parameter in a direct manner, such as > /mnt/pvfs2/filename, does it mean that kernel interface is used, and > ROMIO is bypassed? Is there any documents on this topic? Thank you.
Hi. I'm really happy to hear you're using MPI-IO and PVFS. That should be a very good combination for you. Let us know if you run into problems. You can specify the file name two ways: if you put a 'pvfs2:' prefix in front of the file name, ROMIO will bypass its autodetection step. But if you omit the prefix, ROMIO will stat the file system, figure out it's PVFS and use that interface. So the kernel is bypassed either way. Have fun ==rob -- Rob Latham Mathematics and Computer Science Division A215 0178 EA2D B059 8CDF Argonne National Lab, IL USA B29D F333 664A 4280 315B _______________________________________________ Pvfs2-users mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
