Hi, Am 22.11.2013 um 17:32 schrieb Gans, Jason D:
> I would like to run an instance of my application on every *core* of a small > cluster. I am using Torque 2.5.12 to run jobs on the cluster. The cluster in > question is a heterogeneous collection of machines that are all past their > prime. Specifically, the number of cores ranges from 2-8. Here is the Torque > "nodes" file: > > n0000 np=2 > n0001 np=2 > n0002 np=8 > n0003 np=8 > n0004 np=2 > n0005 np=2 > n0006 np=2 > n0007 np=4 > > When I use openmpi-1.6.3, I can oversubscribe nodes but the tasks are > allocated to nodes without regard to the number of cores on each node > (specified by the "np=xx" in the nodes file). For example, when I run "mpirun > -np 24 hostname", mpirun places three instances of "hostname" on each node, > despite the fact that some nodes only have two processors and some have more. You submitted the job itself by requesting 24 cores for it too? -- Reuti > Is there a way to have OpenMPI "gracefully" oversubscribe nodes by allocating > instances based on the "np=xx" information in the Torque nodes file? It this > a Torque problem? > > p.s. I do get the desired behavior when I run *without* Torque and specify > the following machine file to mpirun: > > n0000 slots=2 > n0001 slots=2 > n0002 slots=8 > n0003 slots=8 > n0004 slots=2 > n0005 slots=2 > n0006 slots=2 > n0007 slots=4 > > Regards, > > Jason > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
