[OMPI users] example program "ring" hangs when running across multiple hardware nodes

Dear openmpi gurus, I am running openmpi 1.7.2 on a homogenous cluster of Apple XServes running OS X 10.6.8. My hardware nodes are connected through four gigabit ethernet connections; I have no infiniband or other high-speed interconnect. The problem I describe below is the same if I use openmpi 1

Re: [OMPI users] example program "ring" hangs when running across multiple hardware nodes (SOLVED)

Dear Gus, Thanks for your help - your clue solved my problem! The ultimate solution was to limit mpi communications to the local, unrouted subnet. I made this the default behavior of all users of my cluster by adding the following line to the bottom of my $prefix/etc/openmpi-mca-params.conf file