It's because Open MPI uses a tree-based ssh startup pattern.
(amusingly enough, I'm literally half way through writing up a blog entry about
this exact same issue :-) )
That is, not only does Open MPI ssh from your mpirun-server to host1, Open MPI
may also ssh from host1 to host2 (or host1 to h
Hi
I'm hoping that someone will be able to help me figure out a problem with
connecting to multiple nodes with v1.8.4.
Currently, I'm running into this issue:
$ mpirun --host host1 hostname
host1
$ mpirun --host host2,host3 hostname
host2
host3
Running this command on 1 or 2 nodes generates t
