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Subject: Re: [OMPI users] local config files / recursive includes
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-05-08 10:21:47


Starting in the v1.3 series, we put in slightly better checks about
when to issue this warning or not. It *shouldn't* display the
warnings if the OpenFabrics drivers are not loaded.

Can you verify if your OpenFabrics drivers are loaded on your new, non-
IB nodes?

On May 8, 2009, at 4:40 AM, Brett Pemberton wrote:

> Hey,
>
> We have a cluster with infiniband, and openmpi working happily.
> We've just added some new nodes, with no ib. The scheduler has been
> told to only schedule jobs onto those nodes, which don't span
> nodes. Easy.
>
> Except that openmpi warns the user that no openib was found, and
> it's dropping back to another transport (possibly at a penalty).
> This is no problem to me, but it worries our users for no reason.
>
> My plan was to put some local openmpi mca config files on those
> nodes that only allow sm,self,tcp which (I'd hope) would eliminate
> the warning that it can't use openib. However our openmpi installs
> are to a global fs.
>
> Is it possible to put a line in the global $SYSCONFDIR/etc/openmpi-
> mca-params.conf to tell it to also include a subsequent /etc/openmpi-
> mca-params.conf
>
> Any better ways of handling this would also be appreciated.
>
> cheers,
>
> / Brett
>
> --
> Brett Pemberton - VPAC Senior Systems Administrator
> http://www.vpac.org/ - (03) 9925 4899
> _______________________________________________
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> users_at_[hidden]
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>

-- 
Jeff Squyres
Cisco Systems