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

[Bastian Scholz]

Am 2012-06-06 14:19, schrieb Liu Yuan:
> Well, the membership management backend such as corosync can only
> reliably support less than 20 nodes. This means you can't add more 
> nodes
> into a running cluster with Corosync when number exceeds 15~20, See 
> more
> info about it, https://github.com/collie/sheepdog/wiki

Thanks for the Info, I already see it in the wiki and the
mailing list. Current tests are with corosync driver, but
I think, we move to zookeeper in our future production
environment...

> Yes, Christoph's patch will hit the performance a lot if the cluster 
> is
> less than 10 I guess, because with smaller cluster, more data of the
> virtual disk will be located in local node but we won't get a 
> shortcut
> to the local storage with the patch.

Maybe Christoph is willing to do three tests with small, medium and
big number of nodes to see, how big the Performance impact will be?

If a small setup is widely used, and it is a big performance impact
it my be a bad idea to ignore local storage (from an End-User Point
of view ;-)

Cheers

Bastian