[MPICH] problems with writing in mpi, slaves processes doesnt write

[Robert Latham]

On Tue, Jan 16, 2007 at 08:54:00AM -0400, Luiz Mendes wrote:
> I have two PCS here. One of them, the master node and the another one that
> is a slave.
> 
> I installed mpich 1.2.7p1 and configured the two machines in 
> Machine.LINUXfile.
> 
> Well, but when i test io operations with 2 processes, the slave process
> doesnt write. Why?
> 
> i have installed mpich 1.2.7p1 on the 2 pcs in the same folder,
> /usr/share/MPI-1, and after i export /usr/share/MPI-1 from the master node
> to the slave node, mouting it in /usr/share/MPI-1 in slave PC.
> 
> What should i do to make it works?

Nothing sounds wrong from your description.  If your test program is
small enough, you should post it and maybe we can either reproduce the
bug on our end, or point out something you may have overlooked in your
MPI code.

> And, do you know something about use pvfs2+mpich 1.2.7p1?

The PVFS support in MPICH-1.2.7p1 is fair, but not as good as what you
can find in MPICH2-1.0.5.  The version in MPICH2 contains many bug
fixes and performance improvements.

==rob

-- 
Rob Latham
Mathematics and Computer Science Division    A215 0178 EA2D B059 8CDF
Argonne National Lab, IL USA                 B29D F333 664A 4280 315B