I could swear that we had an FAQ entry about this, but I can't find it.
It is certainly easiest if you can open random TCP ports between MPI processes
in your cluster. Can your admin open all inbound TCP ports from all nodes in
your cluster (this is different than opening up all inbound TCP por
I'm attempting to launch my app via mpirun and a host file to use nodes on
multiple 'stand-alone' servers. mpirun is able to launch my app on all
requested nodes on all servers, but my app doesn't seem to be able to
communicate via the standard MPI api calls (send , recv, etc). The
problem se
