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Subject: [OMPI users] openmpi-default-hostfile
From: Benjamin Gaudio (benjamin.gaudio_at_[hidden])
Date: 2010-02-08 10:50:20


I'm using ClusterTools 8.2.1 on Solaris 10 and according to the HPC
docs,

"Open MPI includes a commented default hostfile at
/opt/SUNWhpc/HPC8.2/etc/openmpi-default-hostfile. Unless you
specify
a different hostfile at a different location, this is the hostfile
that OpenMPI uses."

I have added my list of hosts to that file. If I don't specify a
hostfile in the mpirun command, it doesn't use any of the hosts in
the file, it just runs everything on the node that I run the command
on. However, if I implicitly call the hostfile in the mpirun command
with -hostfile /opt/SUNWhpc/HPC8.2.1/etc/openmpi-default-hostfile,
then it works as it should. So, I have come to the conclusion that
mpirun is not reading my default file for some reason. Is there a
way to figure out why?

Benj