Newsgroups: comp.parallel.mpi
From: gdburns@osc.edu (Greg Burns)
Subject: Re: LAM with 2 nodes on the same workstation ?
Organization: Ohio Supercomputer Center
Date: 22 Jul 1996 16:41:02 -0400
Message-ID: <4t0p0u$hgh@tbag.osc.edu>

In article <31F3083A.2432@wag.caltech.edu> Mihail Iotov <iotov@wag.caltech.edu> writes:
>Is it possible to run LAM with two nodes on the same workstation ?
>
>I tried putting two identical lines in the lamhosts file, but it results
>in recon complaining about it.

It is not possible and not easily done because the client makes
a rendez-vous with the local daemon based on the userid/hostname.
One daemon defines one node.

With MPI, which is totally process-oriented, it is difficult to
imagine why you would want to force multiple nodes (I assume you
have reasons for using only one host).  There is nothing different
MPI-wise about executing two processes under one node or one under
each of two nodes.

With a better understanding of your requirements, I might be able
to be more helpful.

-=-
Greg Burns				gdburns@osc.edu
Ohio Supercomputer Center		http://www.osc.edu/lam.html

