[Gluster-users] Performance for KVM images (qcow)
Robert Hajime Lanning
lanning at lanning.cc
Tue Apr 9 10:13:10 UTC 2013
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
King of the Potato People
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