[Beowulf] MPI community

Geoff Jacobs gdjacobs at gmail.com
Fri Jun 17 20:29:22 PDT 2005

Cheng, Kevin wrote:

> Hi there
> Am new to the mailing list and wondering what we can talk about? I
> have been trying to find MPI-CH or MPI help/forums/community but
> couldn't find any.
> 1. Is it possible to set up MPICH-1 or MPICH-2 on a single machine and
> trick it to emulate 2 hosts? Basically developing on a single machine
> but doing MPI_Send, MPI_Gather calls.
Yes. If you are using MPICH p4, then you can simulate a cow as long as
you can ssh to localhost:

ssh someuser at localhost

> 2. Is it possible to have two hosts, one Windows MPI-CH, and one Linux
> MPI-CH, to work together?
Yes (heterogenous clusters). This requires knowledge of data packing and
compiler interoperation of a scale which I do not possess. In other
words, it can be tricky.

> 3. Is it possible to have MPI-CH-1 and MPI-CH-2 work together on
> separate hosts?

> Many thanks
>Beowulf mailing list, Beowulf at beowulf.org
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Geoffrey D. Jacobs

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