Is it possible to run OpenMPI on a local computer AND a remote cluster?

Question

I have a set of computational operations that need to be performed a cluster (maybe like 512 MPI processes). Right now, I have the root node on the cluster open a socket and tr

Answer 1

Yes, it should just work out of the box if there is a TCP/IP connection available (MPI communicates at a random, high TCP port - if TCP is used as transfer layer). Try adding your machine to the hostfile which you supply to mpirun. If that doesn't work, you can directly connect to your machine using MPI_Open_port which doesn't require mpirun.