On Mon, Dec 04 2017, gordon chung wrote: > On 2017-12-04 05:30 AM, Jaze Lee wrote: >> Right now,we can get volume from central pollester. Then i think >> may be we can drop cinder volume usage. > > which metrics are you referring to? just for the record, except for > libvirt stats, the polling done by ceilometer is against the API which > may create additional load.
Which is usually a problem because of the APIs, not Ceilometer. They're sometimes utterly slow for simple things and other times don't offer a way to retrieve what Ceilometer needs in a batch-y way. > in general, there's a preference that stats be pushed to ceilometer > rather than pulled. Yes, but for the wrong reasons. Having a component sending a batch of notification every hour without any configuration knob and granularity choice is a PITA for the users. Plus it ususally comes from a single point (of failure?). Ceilometer would do a better job than $project at getting this info, if said project(s) would offer a proper and performant API to retrieve them efficiently. -- Julien Danjou -- Free Software hacker -- https://julien.danjou.info
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