In a similar situation i wrote a simple shell script "rankcreate.sh" which creates a rank file assigning the various ranks to the correct processors/slots when given a number of processes. In addition, this script returns the name of this created rank file. I then use it like this:
mpirun -np 5 --rankfile `rankcreate.sh 5` myApplication May be this is of use for you jody On Fri, Dec 10, 2010 at 11:50 PM, Eugene Loh <eugene....@oracle.com> wrote: > David Mathog wrote: > >> Also, in my limited testing --host and -hostfile seem to be mutually >> exclusive. >> > No. You can use both together. Indeed, the mpirun man page even has > examples of this (though personally, I don't see having a use for this). I > think the idea was you might use a hostfile to define the nodes in your > cluster and an mpirun command line that uses --host to select specific nodes > from the file. > >> That is reasonable, but it isn't clear that it is intended. >> Example, with a hostfile containing one entry for "monkey02.cluster >> slots=1": >> >> mpirun --host monkey01 --mca plm_rsh_agent rsh hostname >> monkey01.cluster >> > > Okay. > >> mpirun --host monkey02 --mca plm_rsh_agent rsh hostname >> monkey02.cluster >> > > Okay. > >> mpirun -hostfile /usr/common/etc/openmpi.machines.test1 \ >> --mca plm_rsh_agent rsh hostname >> monkey02.cluster >> > > Okay. > >> mpirun --host monkey01 \ >> -hostfile /usr/commom/etc/openmpi.machines.test1 \ >> --mca plm_rsh_agent rsh hostname >> -------------------------------------------------------------------------- >> There are no allocated resources for the application hostname >> that match the requested mapping: >> >> Verify that you have mapped the allocated resources properly using the >> --host or --hostfile specification. >> -------------------------------------------------------------------------- >> > > Right. Your hostfile has monkey02. On the command line, you specify > monkey01, but that's not in your hostfile. That's a problem. Just like on > the mpirun man page. > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
