MPIEXEC IS USING SSH AND IS GENERATING SSH MESSAGES

[Pete Wyckoff]

francois at hpce.nec.com said on Thu, 11 Sep 2003 12:51 +0200:
> I checked the mpiexec i was using : it was OSC's mpiexec.
> It looks like the problem i encountered came from the interaction beetween
> PBS (configuration issue ?)
> with ssh.
> OSC's mpiexec is working perfectly on another cluster .
> (the 2 clusters were supposed to be configured the same way).

Mpiexec really does not invoke ssh (or rsh) in any way.  What could be
happening is some startup script on your system, like /etc/profile or
/home/francois/.bashrc or a PBS prologue file, is trying to use
ssh-keygen.  No clue why this would be happening, but you might go
looking around.

> Furthermore i have 2 other questions , one regarding openpbs the other
> regarding mpich with emp.
> (the url www.osc.edu/~pw/emp  is not working for me)
> Has EMP work been thrown away ?

The URL works fine here:  http://www.osc.edu/~pw/emp/
but the code is getting old, and unless you have the certain type of
Tigon2-based NICs it supports, you do not want to use this.  Ask me
privately if you are not yet scared away.

> Regarding Openpbs the question is the following one :
> how to create a queue for sequential jobs only ?
> (limiting the usage to one processor at a time per job)
> This is because we are using smp nodes.
> The problem is to prohibit users to submit parallel jobs in a sequential
> queue and
> use several cpus.
> (resources_max.nodect=1 still grants access to the number of processors a
> node have)
> 
> Whom could i ask ?

Might want to try the folks at pbs-users at openpbs.com for this one.

		-- Pete