If you add the following to your environment, you should run on multiple nodes:
OMPI_MCA_rmaps_base_mapping_policy=node OMPI_MCA_orte_default_hostfile=<your hostfile> The first tells OMPI to map-by node. The second passes in your default hostfile so you don't need to specify it as an Info key. HTH Ralph On Tue, Feb 3, 2015 at 9:23 AM, Evan Samanas <evan.sama...@gmail.com> wrote: > Hi Ralph, > > Good to know you've reproduced it. I was experiencing this using both the > hostfile and host key. A simple comm_spawn was working for me as well, but > it was only launching locally, and I'm pretty sure each node only has 4 > slots given past behavior (the mpirun -np 8 example I gave in my first > email launches on both hosts). Is there a way to specify the hosts I want > to launch on without the hostfile or host key so I can test remote launch? > > And to the "hostname" response...no wonder it was hanging! I just > constructed that as a basic example. In my real use I'm launching > something that calls MPI_Init. > > Evan > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/02/26271.php >
