Performance for KVM images (qcow)

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On Tue, 09 Apr 2013 03:13:10 -0700
Robert Hajime Lanning <lanning at lanning.cc> 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.

Let me drop in that no clear mind does it this way. Obviously one would give
the client more physical network cards, best choice as many as there are
replications, and do the subnetting accordingly.

-- 
Regards,
Stephan


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