[Lustre-discuss] InfiniBand QoS with Lustre ko2iblnd.

Daniel Kobras kobras at linux.de
Tue May 19 10:05:03 PDT 2009


Hi!

On Mon, May 18, 2009 at 01:34:03PM -0700, Jim Garlick wrote:
> Hi, I don't know much about this stuff, but our IB guys did use QoS
> to help us when we found LNET was falling apart when we brought up
> our first 1K node cluster based on quad socket, quad core opterons,
> and ran MPI collective stress tests on all cores.
> 
> Here are some notes they put together - see the "QoS Policy file" section.

Great summary, thanks for sharing! Seems like qos-ulp is a rather recent
OpenSM-specific feature, and the SMs in our switches apparently don't
offer a similar SID-to-SL mapping, either. , but it certainly got me a
leap further.

Thanks,

Daniel.




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