Dear Open MPI developer, here: http://www.open-mpi.org/faq/?category=running#mpi-environmental-variablesare enlisted four envvars Open MPI set for every process. We use they for some scripting and thank you for providing they.
But simple "mpiexec -np 1 env | grep OMPI" brings lotz more envvars. These are interesting for us:
1) OMPI_COMM_WORLD_LOCAL_SIZE - seem to contain the number of processes which are running on the specific node, see also
http://www.open-mpi.org/community/lists/users/2008/07/6054.phpIs this envvar also "stable" as OMPI_COMM_WORLD_LOCAL_RANK is? (This would make sense as it looks like the OMPI_COMM_WORLD_SIZE, OMPI_COMM_WORLD_RANK pair.)
If yes, maybe it also should be documented in the Wiki page.2) OMPI_COMM_WORLD_NODE_RANK - is that just a double of OMPI_COMM_WORLD_LOCAL_RANK ?
Best wishes, Paul Kapinos -- Dipl.-Inform. Paul Kapinos - High Performance Computing, RWTH Aachen University, Center for Computing and Communication Seffenter Weg 23, D 52074 Aachen (Germany) Tel: +49 241/80-24915
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