Newsgroups: comp.parallel.mpi
From: kumbera@allmalt.cs.uwm.edu (Mike Kumbera)
Subject: SP2 and Onyx MPI applications
Organization: University of Wisconsin-Milwaukee
Date: 7 Oct 1995 02:55:58 GMT
Message-ID: <454q7u$9i@uwm.edu>

I'm having some problems using MPI on a SP2 and I was hoping
someone has ideas.

I'm trying to run a program on both a SP2 AND a SGI Onyx.

I can use the SP2 processors together over the switch but I then
loose the ability to communicate with other machines over ethernet.

Recently, I saw a solution posted here to run a MPI program on
multiple SGI processors by confuguring MPI to use both shared
memory (for inter processor) and p4 (for inter machine). 

What I'm shooting for is a similar solution for the SP2...

The ideal solution would allow me to use configurations of 128 sp2
nodes (communicating over the switch) and 4 Onyx processors
(communicating with shared memory) hooked together over a HIPPI
 connection.

The next best would be to use only 1 Onyx processor and the SP2.
Again I would NOT want to use ethernet for the communication between
SP2 nodes.


Any ideas???

mike

