Newsgroups: comp.parallel.mpi
From: ranga@cs.umd.edu (M.Ranganathan)
Subject: mpi intercommunicators
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Date: 12 Oct 1995 11:19:40 -0400
Message-ID: <45jbmc$3t1@catfish.cs.umd.edu>


Can mpi inter communicators be used in exactly the same way as pvm 
groups ?

For example, if I have a group of processes that need to talk to 
another group of processes (whose communicator is not known at
the time of compilation) how can I do this ? In pvm, all I need
to know is the group name. I can query the group server to determine
the processes in the group. How do I do something analogous in mpi ?
Are inter communicator handles global ? 

I am just getting started with mpi and hence this is likely to be a
set of obvious questions.

Thanks.

Ranga.


