[Lustre-discuss] InfiniBand QoS with Lustre ko2iblnd.

Isaac Huang He.Huang at Sun.COM
Tue Jun 30 23:31:36 PDT 2009


On Wed, Jul 01, 2009 at 02:07:33AM -0400, Isaac Huang wrote:
> ......
> >> For your current concern of setting up different SLs, I'd believe that
> >> it could be achieved via target GUIDs as mentioned in my previous reply.
> >
> > Unfortunately, configuring IB QoS via target GUIDs quickly becomes too  
> > complicated. As the size of clusters grow, it would require to list  
> > hundreds of GUIDs in the QoS policy rules.
> 
> Yes, it's rather cumbersome at bigger scales.

It just occurred to me that it might work by configuring QoS policy
based on IB partition keys. It's just an initial thought - if you'd 
configure two @o2ib networks over two IB partitions over the same
fabric, one for each filesystem, then you might differentiate traffic
of the two FS based on their partition keys. I think it'd be much
easier to configure an additional @o2ib network than to maintain
hundreds of GUIDs that could change in the policy file.

By default the o2iblnd runs over the default IB partition. Please see 
bug 18602 for how to configure the o2iblnd over a non-default partition.

Thanks,
Isaac



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