Difference between revisions of "OpenMPI"
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== MCA parameter files == | == MCA parameter files == | ||
If you want to permanently use some MCA parameter settings, you can create a file $HOME/.openmpi/mca-params.conf, e.g.: | If you want to permanently use some MCA parameter settings, you can create a file $HOME/.openmpi/mca-params.conf, e.g.: | ||
| − | |||
| − | |||
cat $HOME/.openmpi/mca-params.conf | cat $HOME/.openmpi/mca-params.conf | ||
btl_tcp_if_exclude = lo,eth1 | btl_tcp_if_exclude = lo,eth1 | ||
| + | |||
| + | == Handling SSH key issues == | ||
| + | |||
| + | This trick avoids a confirmation message asking "yes" when asked by SSH if a host should be added to known_hosts: | ||
| + | |||
| + | ssh -q -o StrictHostKeyChecking=no | ||
| + | |||
| + | So with OpenMPI it can be used as | ||
| + | |||
| + | mpirun --mca plm_rsh_agent "ssh -q -o StrictHostKeyChecking=no" | ||
| + | |||
| + | == Running applications on Multiprocessors/Multicores == | ||
| + | Process can be bound to specific sockets and cores on nodes by choosing right options of mpirun. | ||
| + | * [http://www.open-mpi.org/doc/v1.4/man1/mpirun.1.php#sect9 Process binding] | ||
| + | * [http://www.open-mpi.org/doc/v1.4/man1/mpirun.1.php#sect10 Rankfile] | ||
| + | |||
| + | == PERUSE == | ||
| + | [[Media:current_peruse_spec.pdf|PERUSE Specification]] | ||
Latest revision as of 10:45, 22 August 2012
Contents
MCA parameter files
If you want to permanently use some MCA parameter settings, you can create a file $HOME/.openmpi/mca-params.conf, e.g.:
cat $HOME/.openmpi/mca-params.conf btl_tcp_if_exclude = lo,eth1
Handling SSH key issues
This trick avoids a confirmation message asking "yes" when asked by SSH if a host should be added to known_hosts:
ssh -q -o StrictHostKeyChecking=no
So with OpenMPI it can be used as
mpirun --mca plm_rsh_agent "ssh -q -o StrictHostKeyChecking=no"
Running applications on Multiprocessors/Multicores
Process can be bound to specific sockets and cores on nodes by choosing right options of mpirun.
