[mpich-discuss] How to use ppr with mpiexec?

[Jeffrey Layton]

Good morning,

I'm trying to "port" an Open MPI script with MPICH and I'm having some
trouble. I've got a few questions.

   1. What is the form of the "-hosts" option? Is it something like '-hosts
   node1:4 node2:4 node3:4 ...'?
   2. The Open MPI script has an option "-map-by ppr:4:node" that tells it
   to run 4 processes per node and then it runs as many nodes as needed to
   meet the number of processes. How can I do this in MPICH?

Thanks for the help!

Jeff
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