[openib-general] IBM utilizing and testing openIB release 1 RCx

[Stephen Poole]

Great news Kevin, and thanks for the support.

Steve...

At 7:59 PM -0500 3/24/06, Kevin Reilly wrote:
>    We wanted to let others in the OpenIB community know that IBM is using
>and testing openIB as it's base support for it's IBM HCA
>as part of  linux on Power offerings.  We are in the process of testing
>much of our clustering  software and high performance subsystems
>layered over some of the openIB interfaces like the user verbs and
>IPoverIB.
>
>      So far the testing has been going very well and most of the problems
>we hit were found and fixed soon after we hit them.
>Many times the fix was already  in a newer subversion level when we hit it.
>As we hit problems we'll open bugzillas and we will
>report  problems so they can be picked up in newer RC levels.
>
>   The biggest problem we have at the moment is being able to tune the
>IPoverIB drivers  sendq_size and recvq_size.  We simply
>can get IP to work without tuning these parameters in some situations.  For
>example, running our cluster filesystem file server over
>IPoverIB.  The server that is a filesystem server needs to have many socket
>connections open and we use a big 8 or 16 way server
>for this purpose. We very quickly overrun the IPoverIB drivers send and
>receive queue. We are submitting a patch so we can tune
>these because we couldn't get things to work with the defaults and not way
>to tune.
>
>Kevin J. Reilly
>STSM, HPC Architecture
>-HPC interconnect architect
>(office) 845-433-7976  (tieline) 8-293-7976
>
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-- 
Steve Poole (spoole at lanl.gov) 
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