Re: [Condor-users] Quick n Dumb MPI Question

[mmb05@xxxxxxxx]

Thanks,
 I must've had a big lapse of memory when the "parallel universe" stuff came up during Condor Week. We're considering Condor as a scheduler for our new, 200-odd node cluster at the University of Arkansas, and were looking for MVAPICH compatability. 

Matt



----- Original Message -----
From: Erik Paulson <epaulson@xxxxxxxxxxx>
Date: Wednesday, April 27, 2005 1:01 pm
Subject: Re: [Condor-users] Quick n Dumb MPI Question

> On Mon, Apr 25, 2005 at 11:07:58PM -0500, Matt Baker wrote:
> > I'm currently setting up a 10-node cluster to run MPI under 
> Condor. This
> > cluster has the latest stable ROCKS configuration, with MPI 1.2.6.
> > I know I need to use 1.2.4 for Condor to run jobs, but I'm not 
> that fluent
> > in MPI yet.
> > 
> > 1. Does 1.2.4 need to be installed on compute nodes, or is just 
> mpicc needed
> > on the head node?
> > 
> 
> Just mpicc on the head node - or wherever you plan on using it (it 
> doesn'thave to be on the cluster, of course)
> 
> > 2. Are there plans for 1.2.x / MPICH2 / whatever MPI under Condor?
> > 
> 
> Yes, it's a feature planned for 6.8.0, so it will show up in a 6.7 
> release.Not 6.7.7 though. 
> 
> > 3. What's the (probably obvious) problem in condor_submitting a 
> shell script
> > that calls mpirun instead of using the MPI universe?
> > 
> 
> Your shell script is only sort of told what nodes are allocated to it,
> and it won't be easily able to tell Condor that it's alive - if 
> it's 
> not the MPI universe, the execute nodes will never hear from the 
> condordaemons on the submit machine that things are going well, and 
> they'll timeout
> and tear down the allocation after a few minutes. 
> 
> If you really want to try, see this:
> 
> https://lists.cs.wisc.edu/archive/condor-users/pre-2004-
> June/msg00355.shtml
> -Erik
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