[IPython-dev] MPI on Windows HPC
Wed Sep 25 10:58:12 CDT 2013
Aron Ahmadia <aron <at> ahmadia.net> writes:
> My understanding is that I really want these to be recognised as part of the
> same group - is this possible?
> This is an MPI question, not an IPython question.
> That said, the answer depends on your MPI implementation. MPI_COMM_WORLD
(which is the communicator you're using here), is populated at process launch.
There are ways to form groups of processes after process launch, see
intracommunicators in the MPI-2 documentation, but you should understand that
this is not a very commonly used technique in the HPC world.
Thanks for the quick reply! I wasn't sure if it was pure MPI or to do with the
way ipython was running under MPI.
Since my processes can be killed and restarted I think I'll have to at least
investigate this technique...
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