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From: Bill Johnstone (beejstone3_at_[hidden])
Date: 2007-07-18 13:46:48

--- Ralph Castain <rhc_at_[hidden]> wrote:

> No, the session directory is created in the tmpdir - we don't create
> anything anywhere else, nor do we write any executables anywhere.

In the case where the TMPDIR env variable isn't specified, what is the
default assumed by Open MPI/orte?

> Just out of curiosity: although I know you have different arch's on
> your
> nodes, the tests you are running are all executing on the same arch,
> correct???

Yes, tests all execute on the same arch, although I am led to another
question. Can I use a headnode of a particular arch, but in my mpirun
hostfile, specify only nodes of another arch, and launch from the
headnode? In other words, no computation is done on the headnode of
arch A, all computation is done on nodes of arch B, but the job is
launched from the headnode -- would that be acceptable?

I should be clear that for the problem you are helping me with, *all*
the nodes involved are running the same arch, OS, compiler, system
libraries, etc. The multiple arch question is for edification for the

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