<br><font size=2 face="sans-serif">I'm trying to run the CMAQ air quality
model (http://cmaq-model.org) using MPICH. Many people have done
this successfully, but I'm having some trouble that I believe is due to
the way my system is setup. We have two 8 CPU HPs running RedHat
Linux Enterprise 5. These two machine each have data storage available
to them and each machine can access the others data storage area. I
have installed MPICH on both machines. I'm trying to run the model
from one machine using all the CPUs on that machine and the CPUs on the
other machine using a MACHINEFILE. I'm running the model from the
shared data space so that no matter which machine I run the model from,
it is in the same directory. When I run from either machine using
CPUs from both machines the run stops with many mpi messages. Below
is the last message in the list:</font>
<br>
<br><font size=2 face="sans-serif">main (/usr/local/mpich2-1.3.2p1/src/pm/hydra/ui/mpich/mpiexec.c:404):
process manager error waiting for completion</font>
<br>
<br><font size=2 face="sans-serif">If I run on either machine using the
CPUs for that same machine the run completes with no errors. If I
run on either machine using only CPUs from the other machine, the run completes
with no errors.</font>
<br>
<br><font size=2 face="sans-serif">Does anybody know what might be wrong?
I really need to be able to run using all the CPUs from both machines.</font>
<br>
<br><font size=2 face="sans-serif">Thank you,</font>
<br><font size=2 face="sans-serif"><br>
Andy Holland<br>
Air Quality Modeler<br>
URS Corporation<br>
1600 Perimeter Park Drive<br>
Suite 400<br>
Morrisville, NC 27560<br>
Direct: (303) 796-4694<br>
Cell: (919) 619-4218<br>
Fax: (919) 461-1415<br>
andy_holland@urscorp.com</font>
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