[Beowulf] MPICH vs. OpenMPI

[Mark Hahn]

> Can anyone give me a quick comparison of OpenMPI vs. MPICH? I've always
> used MPICH (I never liked lam), and just recently heard about OpenMPI.
> Anyone here using it?

openmpi is a genetic descendent of lam (with significant other contributors,
of course).  I have not seen any good comparison which makes technical or
performance arguments in favor of open-mpi vs mpich, unfortunately.