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Subject: Re: [OMPI users] How closely tied is a specific release of OpenMPI to the host operating system and other system software?
From: Richard Walsh (Richard.Walsh_at_[hidden])
Date: 2011-02-01 17:12:40


We have 3 Rocks Clusters, while there is a default MPI with each
Rocks Release, it is often behind the latest production release as
you note.

We typically install whatever OpenMPI version we want in a shared space
and ignore the default installed with Rocks. Sometimes there standard
Linux libraries that can be a bit out of date which may be registered as
"can't finds" in the configuration and/or buiild of OpenMPI, but there usually an
easy go around. As far as 'closely intertwined' goes, I would say that
is an exaggeration.

It does mean some extra work for someone ... around here is it me ... ;-) ...


Richard Walsh
Parallel Applications and Systems Manager
CUNY HPC Center, Staten Island, NY

Reason does give the heart pause;
As the heart gives reason fits.

Yet, to live where reason always rules;
Is to kill one's heart with wits.
From: users-bounces_at_[hidden] [users-bounces_at_[hidden]] on behalf of Jeffrey A Cummings [Jeffrey.A.Cummings_at_[hidden]]
Sent: Tuesday, February 01, 2011 5:02 PM
To: users_at_[hidden]
Subject: [OMPI users] How closely tied is a specific release of OpenMPI to the host operating system and other system software?

I use OpenMPI on a variety of platforms: stand-alone servers running Solaris on sparc boxes and Linux (mostly CentOS) on AMD/Intel boxes, also Linux (again CentOS) on large clusters of AMD/Intel boxes. These platforms all have some version of the 1.3 OpenMPI stream. I recently requested an upgrade on all systems to 1.4.3 (for production work) and 1.5.1 (for experimentation). I'm getting a lot of push back from the SysAdmin folks claiming that OpenMPI is closely intertwined with the specific version of the operating system and/or other system software (i.e., Rocks on the clusters). I need to know if they are telling me the truth or if they're just making excuses to avoid the work. To state my question another way: Apparently each release of Linux and/or Rocks comes with some version of OpenMPI bundled in. Is it dangerous in some way to upgrade to a newer version of OpenMPI? Thanks in advance for any insight anyone can provide.

- Jeff


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