Open Stack

Hi Nihongi,
Thanks for your attention. I have tried to commit patches for this issue.
Gerrit 
topic:https://review.openstack.org/#q,topic:bp/direct-alarm-evaluator-db-access,n,z 
<https://review.openstack.org/#q,topic:bp/direct-alarm-evaluator-db-access,n,z>
hope it can be helpful for you, and any advice is appreciated:)

? 2014/4/21 18:01, Nobuyoshi Nihongi ??:
> Hi Liu sheng,
>
> We're also investigating alarm_evaluator performance.
> We observed that alarm_evaluator spends half of the time for calling
> ceilometerclient while evaluating alarms.
> Allowing alarm_evaluator directly access db will greatly improve the
> performance if you have many alarms.
>
> Best regards,
> Nihongi
>
>
>> From: liusheng <liusheng1175 at 126.com>
>> To: openstack-dev at lists.openstack.org
>> Date: Tue, 15 Apr 2014 15:26:58 +0800
>> Subject: [openstack-dev] [ceilometer]support direct alarm_evaluator db access
>>
>> Hi there,
>> Currently,alarm_evaluator invoke ceilometerclient to get all assigned
>> alarms. and then, evaluate per alarm by get statistics, which will also
>> call ceilometerclient. this process is:
>> evaluator-->ceilometerclient-->ceilometer API-->db.
>> If we use default option of evaluation_interval (60s), and if we have
>> many alarms, alarm_evaluator will frequently invoke ceilometerclient and
>> will produce many http requests per minute.
>> That is inefficient,it affect the performance of ceilometer(data
>> collection, data query, e.g.). The better way is allowing
>> alarm_evaluator access db directely.
>>
>> Should the related codes of alarm-evaluator need a refactor?
>>
>> Can you provide your thoughts about this?
>>
>> I have registered a related blueprint:
>> https://blueprints.launchpad.net/ceilometer/+spec/direct-alarm-evaluator-db-
>> access
>>
>> Best regards
>> Liu sheng
>>
>>
>> _______________________________________________
>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
> --
> Nobuyoshi Nihongi
> NTT Software Innovation Center
> Phone: +81 422 59 4880
> E-mail: nihongi.nobuyoshi at lab.ntt.co.jp
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20140423/0ee5132b/attachment.html>