mvapich2 over 10g

[Pete Wyckoff]

jjengla at sandia.gov wrote on Wed, 23 May 2007 11:00 -0600:
> We're trying to get mvapich2 going over some 10g ethernet interfaces
> using the following.  We are wanting to use tcp only for these tests and
> move on to using RDMA.  Right now, we're launching via:
> 
> mpiexec -comm=mpich-p4 -v -v -v -transform-hostname="s/tn/tng/" ./cpi
> 
> Normal hostnames are tn[1-28] and 10g interfaces are tng[1-28].  There
> are some issues spawning the job.  Could you take a look and help
> provide some insight on what we need to do to run over 10g?

One thing that jumps out:  you say you're using mvapich2, an mpich2
derivative.  The -comm parameter for this should be "mpich2" (or
"pmi" as a synonym).  You've got mpich-p4 above, which only works on
old mpich1 on TCP/IP.

Your -transform-hostname should work once you pick the right -comm.

		-- Pete