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Subject: [OMPI users] Problem with openmpi-default-hostfile
From: Lukas Razik (linux_at_[hidden])
Date: 2011-11-06 20:16:54


Hello together!

I've built v1.4.3 (which was in OFED-1.5.3.2) and v1.4.4 (from you website).
But in both versions I've the following problem:

If I write some hosts into '/usr/mpi/gcc/openmpi-1.4.4/etc/openmpi-default-hostfile':
cluster1
cluster2
cluster3
cluster4
and execute 'mpirun -np 4 <app>" then only the local host is used.

If I execute 'mpirun -hostfile /.../openmpi-default-hostfile -np 4 <app>' all works fine.
So have I done something wrong or is there another possibility to set a system-wide list of default hosts (i.e. for all users)?

Many thanks for any help!

Regards,
Lukas