OpenMPI
From HCL
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.
