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Subject: Re: [OMPI users] Torque and OpenMPI 1.2
From: Adams, Brian M (briadam_at_[hidden])
Date: 2007-12-19 17:07:23


Ralph,

Thanks for the clarification as I'm dealing with workarounds for this at
Sandia as well...

I might have missed this earlier in the dialog, but is this capability
in the SVN trunk right now, or still on the TODO list?

Brian
----------------------------------------
Brian M. Adams, PhD (briadam_at_[hidden])
Optimization and Uncertainty Estimation
Sandia National Laboratories
P.O. Box 5800, Mail Stop 1318
Albuquerque, NM 87185-1318
Voice: 505-284-8845, FAX: 505-284-2518

> -----Original Message-----
> From: users-bounces_at_[hidden]
> [mailto:users-bounces_at_[hidden]] On Behalf Of Ralph H Castain
> Sent: Wednesday, December 19, 2007 2:35 PM
> To: Open MPI Users <users_at_[hidden]>; pat.o'bryant_at_[hidden]
> Cc: Castain, Ralph H. (LANL)
> Subject: Re: [OMPI users] Torque and OpenMPI 1.2
>
>
> Open MPI 1.3 will support use of the hostfile and the tm
> launcher simultaneously. It will work slightly differently,
> though, with respect to the hostfile:
>
> 1. PBS_NODEFILE will be read to obtain a complete list of
> what has been allocated to us
>
> 2. you will be allowed to provide a hostfile for each
> app_context as a separate entry to define the hosts to be
> used for that specific app_context.
> The hosts in your hostfile, however, must be included in the
> PBS_NODEFILE.
>
> Basically, the hostfile argument will serve as a filter to
> the hosts provided via PBS_NODEFILE. We will use the TM
> launcher (unless, of course, you tell us to do otherwise), so
> the issues I mentioned before will go away.
>
> There will be a FAQ entry describing the revised hostfile
> behavior in some detail. We think the change will help
> rationalize the behavior so it is more consistent across all
> the different use-cases people have invented. ;-)
>
> Hope that helps
> Ralph
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>