[IPython-dev] MPI on Windows HPC

Dave Hirschfeld dave.hirschfeld at gmail.com
Wed Sep 25 11:58:12 EDT 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. 
> Cheers,
> Aron

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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