Re: "Bonding" of Infiniband ports

To: Simon Kainz <simon.kainz@tugraz.at>
Cc: debian-science@lists.debian.org
Subject: Re: "Bonding" of Infiniband ports
From: gennaro.oliva@cnr.it
Date: Tue, 7 Dec 2010 11:24:26 +0100
Message-id: <[🔎] 20101207102426.GA29846@is.na.icar.cnr.it>
In-reply-to: <[🔎] 4CFCC87B.5000709@tugraz.at>
References: <[🔎] 4CFCC87B.5000709@tugraz.at>

On Mon, Dec 06, 2010 at 12:26:51PM +0100, Simon Kainz wrote:
> Our MPI environment uses the native IB connection. We are thinking about
> using all 2 ports of each card. Has anyone tips/do's/dont's concerning
> this setup? I would like to use both ports to "double up" bandwith. Does
> this require a specific switch?

None if you are using openmpi.

> Any information is highly appreciated.

http://www.open-mpi.org/faq/?category=openfabrics#ofa-port-wireup

Best regards
-- 
Gennaro Oliva

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References:
- "Bonding" of Infiniband ports
  - From: Simon Kainz <simon.kainz@tugraz.at>

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