Dear Open MPI developer,
are 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
Is 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
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