[Openstack] Why ceilometer use mongo?

Robert van Leeuwen Robert.vanLeeuwen at spilgames.com
Sat Aug 16 05:44:43 UTC 2014

>From what I have seen and heard MySQL simply won't be able to handle it speed wise.
You might be able to get a very, very small cluster to run on MySQL.
This will be less of an issue with Mongo since writes are faster with Mongo.

I wonder if anyone runs a cluster of some size with ceilometer though. (And what they use)
During a poll at the operators meetup there was no one running it properly in production due to performance issues..

We decided we only wanted to have some graphs of instances and do not need other functionality so we build a plugin to put it in graphite: http://engineering.spilgames.com/using-ceilometer-graphite/

Robert van Leeuwen

Sent from my iPad

> On 16 aug. 2014, at 02:14, "Guillermo Alvarado" <guillermoalvarado89 at gmail.com> wrote:
> Hello,
> I am wondering why Ceilometer uses MongoDB instead MySQL or some relational database?
> What are the advantages of use MongoDB in this specific case?
> Thanks.
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