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Subject: Re: [OMPI users] multipath support for infiniband
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2010-09-22 07:39:32


Yes, check out the btl_openib_max_lmc MCA parameter:

shell$ ompi_info --param btl openib --parsable | grep lmc

On Sep 21, 2010, at 11:45 AM, Jens Domke wrote:

> Hello,
>
> the InfiniBand architecture has a LMC feature to assign mutiple virtual LIDs to one port and so provides multiple paths between two ports. Is there a methode in openmpi to enable message-striping over these paths to increase bandwidth or avoid congestions?
> (I don't mean the multirail feature, to split traffic across two ports of one Hca)
> The only function I have found, was to enable automatic path migration over lmc, but this is only for failover, if I remember rightly.
>
> Regards,
> Jens
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users

-- 
Jeff Squyres
jsquyres_at_[hidden]
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