<div dir="ltr"><div><div><div>Doug,<br></div><br></div>Sorry for confusing you with 'local' term. I meant that collector is up on the node which is one of the Galera-nodes. Data will be replicated and all the Galera nodes will be synced.<br>
<br></div><div>Nadya<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Dec 12, 2013 at 2:01 AM, Doug Hellmann <span dir="ltr"><<a href="mailto:doug.hellmann@dreamhost.com" target="_blank">doug.hellmann@dreamhost.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">
<div class="im">On Tue, Dec 10, 2013 at 9:47 AM, Nadya Privalova <span dir="ltr"><<a href="mailto:nprivalova@mirantis.com" target="_blank">nprivalova@mirantis.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Julien,<br></div><br>Yes, I use the same SQL for Nova and Ceilometer. Thanks for pointing this out. My bad, I didn't take it into account. So if we want to use Ceilometer + MySQL in production (in theory :) ) we need to use separate controllers with Ceilometer's MySQL only. And each controller may run it's own collector which will write data into "local" MySQL. Am I right that only one instance of central-agent may be started (WIP <a href="https://wiki.openstack.org/wiki/Ceilometer/blueprints/tasks-distribution" target="_blank">https://wiki.openstack.org/wiki/Ceilometer/blueprints/tasks-distribution</a>)? Please Julien correct me if I'm wrong. And maybe Ceilometer has recommendations for production deployment and I just missed it? <br>
</div></div></blockquote><div><br></div></div><div><div class="gmail_default" style="font-size:small">You will want all of the ceilometer collectors writing to the same database, rather than having a local database for each one. Otherwise when you query the ceilometer API you won't see all of the results.</div>
<span class="HOEnZb"><font color="#888888">
<br></font></span></div><span class="HOEnZb"><font color="#888888"><div><div class="gmail_default" style="font-size:small">Doug</div><br></div></font></span><div><div class="h5"><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div>
</div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Dec 10, 2013 at 4:25 PM, Boris Pavlovic <span dir="ltr"><<a href="mailto:bpavlovic@mirantis.com" target="_blank">bpavlovic@mirantis.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Nadya, Julien, <div><br></div><div><br></div><div>We are working around profiling system based on logs. This will allows us to detect bottlenecks.</div>
<div>We should make a couple of small patches in each project to support profiling.</div>
<div><br></div><div>As we are going to be well integrated with OpenStack infrastructure we are going to use Ceilometer as a log collector. </div><div>And we already made patch for this in Ceilometer: <a href="https://review.openstack.org/#/c/60262/" target="_blank">https://review.openstack.org/#/c/60262/</a><br>
</div><div>So it will be nice to get it reviewed/merged. <br></div><div><br></div><div><br></div><div>Thanks. </div><div><br></div><div><br></div><div>Best regards,</div><div>Boris Pavlovic </div><div><br></div><div><br>
</div>
<div><br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div>On Tue, Dec 10, 2013 at 3:19 PM, Julien Danjou <span dir="ltr"><<a href="mailto:julien@danjou.info" target="_blank">julien@danjou.info</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>On Tue, Dec 10 2013, Nadya Privalova wrote:<br>
<br>
Hi Nadya,<br>
<div><br>
> Guys, if you have any questions or comments you are welcome! I think that<br>
> 2x difference between avg time in "empty lab" and "5 sec polling" scenario<br>
> is not a bad result. But 100 instances that were being monitored during the<br>
> test is not a real load for the lab. What do you think? Should I repeat the<br>
> test with 1000 instances?<br>
<br>
</div>You didn't mention where you were storing the metrics. If you store them<br>
in the same MySQL DB that's used by Nova for example, it's likely that's<br>
the problem is the load Ceilometer puts on the MySQL cluster slows Nova<br>
down.<br>
<br>
I don't think it's worth running the test with more instances for now.<br>
The results are clear, the next action should be to see why things are<br>
slowed down that much. It shouldn't happen.<br>
<span><font color="#888888"><br>
--<br>
Julien Danjou<br>
# Free Software hacker # independent consultant<br>
# <a href="http://julien.danjou.info" target="_blank">http://julien.danjou.info</a><br>
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