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Re: [Rdo-list] Ceilometer DB?



According to http://docs.openstack.org/developer/ceilometer/install/dbreco.html, there are many database backend choices, mysql included.

There is much discussion on the lists for the ceilometer schema. The MySQL implementation is tested in the gate but shows some performance issues there even at small scale.

At CERN, we run with MongoDB (and have some scalability issues even then which are being worked on with the community)

Tim

-----Original Message-----
From: rdo-list-bounces redhat com [mailto:rdo-list-bounces redhat com] On Behalf Of Perry Myers
Sent: 25 April 2014 00:08
To: jrist redhat com; Erich Weiler; Eoghan Glynn
Cc: rdo-list redhat com
Subject: Re: [Rdo-list] Ceilometer DB?

On 04/24/2014 06:03 PM, Jason Rist wrote:
> On Thu 24 Apr 2014 04:01:54 PM MDT, Erich Weiler wrote:
>>> My understanding is that work is being done on SQLAlchemy as an 
>>> alternative for MongoDB but at this time I don't think it is 
>>> 'supported'.
>>
>> More of a curiosity - but do you know why folks aren't working on 
>> integrating MySQL for ceilometer?  I understand MongoDB is better at 
>> some tasks than MySQL, but given that many (most?) folks use MySQL 
>> for other OpenStack DBs, MongoDB is just "another thing to manage".  
>> You know?
>>
>> I'm sure there is a good reason for it, I'm just curious...
> 
> As SQLAlchemy is an Object Relational Mapper (ORM), it allows the 
> integration of many DBs.

I believe Eoghan may have some light to shed on this.  I know he's told me in the past why the above is the case, I just can't recall from past conversations :)

Perry

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