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 <liusheng1...@126.com>
To: openstack-dev@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
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Nobuyoshi Nihongi
NTT Software Innovation Center
Phone: +81 422 59 4880
E-mail: nihongi.nobuyo...@lab.ntt.co.jp
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