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[bug #38092] Optionally support distributed memory machines using MPI

From: Bernhard Voelker
Subject: [bug #38092] Optionally support distributed memory machines using MPI
Date: Tue, 22 Jan 2013 08:11:59 +0000
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Follow-up Comment #13, bug #38092 (project findutils):

> Is there an easy way to make xargs process only every Nth argument [...]?

Even if there was, you would have to pass this "N" to xargs,
and that would have to be done by the caller - mpirun.
The problem is that you would like to have xargs to process
every Nth argument on node A while xargs on node B should process
every (N+1)th argument etc.

I still got not much knowledge about mpirun - and I'm sorry
that I don't have more time to dive into it -, but from quick
reading thru a few docs like 
it is the job of rank 0 to distribute the data to the others.
I think you're better off asking in the OpenMPI forum.

Finally, IMO MPI won't make it into upstream xargs because
the MPI stuff is usually linked dynamically into a program
... which will be a killer on 99.999% of all PCs it's used on.


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