How does openmpi decide which hosts are used with MPI_Comm_spawn? All
the docs I've found talk about specifying hosts on the mpiexec/mpirun
command and so are not applicable.
I am unable to spawn on anything but localhost (which makes for a pretty
uninteresting cluster).
When I run
ompi_info --param rds hostfile
It reports MCA rds: parameter "rds_hostfile_path"
(current value: "/usr/lib/openmpi/1.2.5-gcc/etc/openmpi-default-hostfile")
I tried changing that file but it has no effect.
I am using
openmpi 1.2.5
CentOS 5.2
ethernet TCP
-- Mark
