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Cannot run jobs more than on two nodes

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Old   September 20, 2012, 19:38
Default Cannot run jobs more than on two nodes
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Antti Korhonen
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We are running OpenFoam with Thirdparty openMPI 1.5.3.
We can only sign jobs upto two nodes.
If we sign jobs to 3 or more nodes job never starts and command just hangs.

This is our command :
(/mirror is NFS share visible on all nodes)

/mirror/OpenFOAM/ThirdParty-2.1.x/platforms/linux64Gcc/openmpi-1.5.3/bin/mpirun -np 12 -hostfile machines /mirror/OpenFOAM/OpenFOAM-2.1.x/bin/foamExe c -prefix /mirror/OpenFOAM interFoam -parallel | tee log

Any ideas why this does not work on more than two nodes (4 cores per node)?
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Old   December 7, 2012, 10:25
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Did you resolve your problem? Because it's happening the same thing with my cluster.

Felipe Magazoni
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Old   December 8, 2012, 13:41
Duong A. Hoang
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we use command like

#mpirun -machinefile $PBS_NODEFILE -mca plm_rsh_agent rsh -np 16 interFoam -parallel >& output.$PBS_JOBID.txt

and it works well.
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