I'd look at what Keystone did fronting the various Key Value stores woth Dogpile. Then the same APi from Keystone can be backed by any Dogpile implementation. We support Reddis, Memcached, with Cassandra and Mongo both somewhere in there (not certain their state)


On 08/16/2014 02:28 AM, Martinx - ????? wrote:
BTW, why not Cassandra, instead of Mongo?! It seems pretty solid...


On 16 August 2014 02:44, Robert van Leeuwen <robert.vanleeu...@spilgames.com <mailto:robert.vanleeu...@spilgames.com>> wrote:

    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/

    Cheers,
    Robert van Leeuwen

    Sent from my iPad

    > On 16 aug. 2014, at 02:14, "Guillermo Alvarado"
    <guillermoalvarad...@gmail.com
    <mailto:guillermoalvarad...@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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