On Fri, 14 Mar 2003, Bryan Ramirez wrote:

> Hi, I'm relatively new to oscar and have been very happy with it so
> far.  I'm about to install some software that uses MPI, and from what
> I've read mpiexec provides better integration between MPI and PBS.  From
> what I can tell, mpiexec is not included with the oscar distribution.
> What would be the best way of installing mpiexec, or would it even be
> worth it?

I'm assuming you are talking about the mpiexec utility provided by Ohio
Supercomputer Center.  It does provide better integration between either
LAM or MPICH and PBS.  The upside is that it speeds startup times slightly
and allows slightly better (but not perfect) end-of-job cleanup.  The
downside is that you may have to rebuild the MPI implementations and
the interface isn't the standard LAM or MPICH interface.

mpiexec seems better suited for large installations.  For smaller ones, it
probably isn't worth the hassle of installing.

At least, that's my $0.02.

Brian

-- 
  Brian Barrett
  Graduate Student, Open Systems Lab, Indiana University
  http://www.osl.iu.edu/~brbarret/


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