[Gluster-users] Performance for KVM images (qcow)

Robert Hajime Lanning lanning at lanning.cc
Tue Apr 9 10:14:49 UTC 2013

On 04/09/13 03:13, Robert Hajime Lanning wrote:
> On 04/09/13 01:17, Eyal Marantenboim wrote:
>> Hi Bryan,
>> We have 1G nics on all our servers.
>> Do you think that changing our design to distribute-replicate will
>> improve the performance?
>> Anything in the gluster performance settings that you think I should
>> change?
> With GlusterFS, almost all the processing is in the client side.  This
> includes replication.  So, when you have "replica 4", the client will be
> duplicating all transactions 4 times, synchronously.  Your 1G ethernet
> just became 256M.
> I don't know how much "in production" your environment is.  You might
> want to try the 3.4 beta with the qemu glusterfs driver (using
> libgfapi.so).
> You should get a good speed bump, by bypassing the FUSE interface.
> Also look into the write-behind and read caching translators for the
> volume itself.

I forgot to pass along this article:

Mr. Flibble
King of the Potato People

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