[torqueusers] OpenMPI and version changed to Torque

[Ken Nielson]

On Fri, Jun 29, 2012 at 9:09 AM, Peter A Ruprecht <
peter.ruprecht at colorado.edu> wrote:

> Hi everyone,
>
> Currently we're using torque 2.5.11 and would like to migrate to 4.x
> pretty soon.  However, some testing with 4.0.2 has shown that programs
> linked against a version of OpenMPI (1.4.x) that was compiled with torque
> 2.5 won't run across more than one node.  My guess is that the task
> manager API has changed between 2.5 and 4.0.
>

The API did not change. But we did require newer versions of autotools to
configure. I wonder if this could be affecting things.

Ken Nielson
Adaptive Computing

>
> Certainly, best practices would suggest recompiling all libraries that
> depend on torque when the torque version changes.  However, a significant
> number of our users would be very unhappy having to re-test and possibly
> recompile their codes with a recompiled OpenMPI.  I think that in some
> cases they are even required to use identical libraries across a whole
> suite of runs to guarantee consistency.  This makes it a little tough to
> ever change the resource manager.
>
> So, getting around to my questions, is it likely that I am understanding
> the dependency between torque, the task manager, and OpenMPI correctly?
> And if so, is it really going to be necessary to recompile OpenMPI?  What
> do you all do in this situation?  Is it a bad idea to run torque (on a big
> cluster, ~1400 nodes and >10000 jobs/day) without using the task manager?
>
> Any commentary or pointers to relevant documentation appreciated!
>
> Pete Ruprecht
>
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