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On Tue, Dec 10, 2013 at 9:47 AM, Nadya Privalova <nprivalova at mirantis.com>wrote:

> Julien,
>
> 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
> https://wiki.openstack.org/wiki/Ceilometer/blueprints/tasks-distribution)?
> Please Julien correct me if I'm wrong. And maybe Ceilometer has
> recommendations for production deployment and I just missed it?
>

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.

Doug



>
>
> On Tue, Dec 10, 2013 at 4:25 PM, Boris Pavlovic <bpavlovic at mirantis.com>wrote:
>
>> Nadya, Julien,
>>
>>
>> We are working around profiling system based on logs. This will allows us
>> to detect bottlenecks.
>> We should make a couple of small patches in each project to support
>> profiling.
>>
>> As we are going to be well integrated with OpenStack infrastructure we
>> are going to use Ceilometer as a log collector.
>> And we already made patch for this in Ceilometer:
>> https://review.openstack.org/#/c/60262/
>> So it will be nice to get it reviewed/merged.
>>
>>
>> Thanks.
>>
>>
>> Best regards,
>> Boris Pavlovic
>>
>>
>>
>>
>>
>>
>> On Tue, Dec 10, 2013 at 3:19 PM, Julien Danjou <julien at danjou.info>wrote:
>>
>>> On Tue, Dec 10 2013, Nadya Privalova wrote:
>>>
>>> Hi Nadya,
>>>
>>> > Guys, if you have any questions or comments you are welcome! I think
>>> that
>>> > 2x difference between avg time in "empty lab" and "5 sec polling"
>>> scenario
>>> > is not a bad result. But 100 instances that were being monitored
>>> during the
>>> > test is not a real load for the lab. What do you think? Should I
>>> repeat the
>>> > test with 1000 instances?
>>>
>>> You didn't mention where you were storing the metrics. If you store them
>>> in the same MySQL DB that's used by Nova for example, it's likely that's
>>> the problem is the load Ceilometer puts on the MySQL cluster slows Nova
>>> down.
>>>
>>> I don't think it's worth running the test with more instances for now.
>>> The results are clear, the next action should be to see why things are
>>> slowed down that much. It shouldn't happen.
>>>
>>> --
>>> Julien Danjou
>>> # Free Software hacker # independent consultant
>>> # http://julien.danjou.info
>>>
>>> _______________________________________________
>>> OpenStack-dev mailing list
>>> OpenStack-dev at lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>>>
>>>
>>
>
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