Re: increase # of mons and use haproxy to increase ceph performance?

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On Tue, Oct 8, 2013 at 2:35 PM, Snider, Tim <Tim.Snider@xxxxxxxxxx> wrote:
> Does inceasing the number of monitors affect  Ceph cluster performance
> (everything else remaining ==)? If it does I hope it’s positive.

In general it won't affect performance at all since the monitors are
out of the data path. If you managed to get a cluster so large that 3
monitors couldn't support the status update messages and requests from
your cluster then adding more could improve things; because each
monitor has to commit to disk on every update then increasing the size
of the cluster will eventually slow down those (out of the data path!)
updates.

> And – will accessing Ceph monitors thru a haproxy server also improve
> performance?
I'm not quite sure how you would do this in a way that the Ceph
protocol could deal with, but maybe I'm missing something.
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com
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