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From David Nalley <da...@gnsa.us>
Subject Re: Questions about KVM storage backends and resize/migrations
Date Sat, 16 Feb 2013 19:15:51 GMT
On Sat, Feb 16, 2013 at 12:36 PM, John Kinsella <jlk@stratosec.co> wrote:
> Bryan - are you running the KVM disks with writethrough or writeback caching? From my
exp, I had to switch to writethrough for gluster to work, and that resulted in a 4x performance
hit for a VM to write to the gluster store vs writing to gluster directly on the host...
>
> John
>

The folks at IBM have been doing lots of work on this to make it less painful.

See http://www.gluster.org/2012/11/integration-with-kvmqemu/

Of course that depends on a new qemu and a yet-to-be-released gluster,
but the early results are promising.

--David

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