[sheepdog] [PATCH] sheep: stop special casing local objects on gateways

Liu Yuan namei.unix at gmail.com
Wed Jun 6 12:59:09 CEST 2012


On 06/06/2012 06:54 PM, Christoph Hellwig wrote:

> On Wed, Jun 06, 2012 at 06:52:16PM +0800, Liu Yuan wrote:
>> At your convenience :) Maybe two (small cluster and bigger one) would
>> suffice. With cached FD pool, we might not lose that much performance
>> for a quick thought, though, but this is quite radical change of design,
>> numbers will definitely help it in. Kazum, how do you think of this change?
> 
> What do you define as a small cluster?  I would expect to see
> substancial differences with a three node cluster, but then again I
> would advice people to not even think about sheepdog for a setup that
> small.
> 
> I'd say performance numbers only start to really matter for 20,30+
> nodes, or does anyone disagree?
> 


Some users in the list claims that they use 2 nodes sheepdog cluster
similar to a raid storage. But I think inherently sheepdog should run
much more nodes. let's keep 'small' as is 5~15, which corosync can
manage well.

Thanks,
Yuan



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