Re: One simple question

From: Justin Riley <no email>
Date: Sat, 23 Oct 2010 14:47:32 -0400

  On 10/23/10 2:19 PM, Alexey PETROV wrote:
> And, could I just confirm, once again - "If a single user need to run
> a MPI task just from time to time (not on routine everyday basis),
> would he have some additional benefits from "queuing system" in a
> cloud, or it better to use MPI straightforward"?
In the case of MPI jobs that use the entire cluster for a single job,
the queuing system isn't as crucial, although it can still be
beneficial. For example, if you want to run more than one MPI job task
one after the other then queuing each of these jobs would allow you to
submit them and forget about them.

Also, OpenMPI is an SGE-aware MPI implementation. This means that if you
qsub an 'mpirun' command, the OpenMPI runtime will recognize that it's
being executed by SGE and fetch the list of hosts to use from SGE rather
than having to build your own hostfile for the jobs. For more details on
using Sun Grid Engine and MPI have a look at the this thread:

http://mailman.mit.edu/pipermail/starcluster/2010-June/000264.html

Hope that helps,

~Justin
Received on Sat Oct 23 2010 - 14:46:14 EDT