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From: Edgar Gabriel (gabriel_at_[hidden])
Date: 2006-07-07 14:09:47

Eric Thibodeau wrote:
> Hello all,
> Before I embark on a train that will run out of tracks, I wanted to
> get a WFF concerning the spwaning mechanisme in OpenMPI. The intent
> is that I would program a "simple" parallel application that would
> demonstrate the ability of recent MPI implementations (OpenMPI) to
> dynamically ADD or remove processes from the parallel task pool. Of
> course, any documentation concerning these new features would also be
> greatly appreciated ;)

Open MPI supports spawning new processes as defined in the MPI-2
specification, see e.g.

However, please note, that this does not modify MPI_COMM_WORLD.
MPI_COMM_WORLD is a static communicator which can not be changed, even
in Open MPI...