[Pvfs2-developers] MPI-io tests

[Murali Vilayannur]

RobL,

> If you opened the file with MPI_COMM_WORLD, that should have already
> happened in ROMIO.  If you need to do independent I/O for some reason,
> then that wouldn't have helped you.    I haven't seen simultaneous
> indpendent file opens cause problems on jazz, but in those cases I'm
> not using the VFS either

We just the MPI part for starting up a lot of processes.. Sorry for the
incorrect phrasing in my emails. We dont use
MPI I/O. Used the posix interface directly.

Simultaneous create problems with vfs is possibly due to the request
scheduler on server not serializing crdirents of the same component name.
I doubt you will even see that kind of pattern at the server with the mpi
i/o interface.
Thanks,
Murali