[openstack-dev] [Ceilometer] Meters vs. Metrics

Tim Bell Tim.Bell at cern.ch
Wed Mar 25 11:35:24 UTC 2015

> -----Original Message-----
> From: Julien Danjou [mailto:julien at danjou.info]
> Sent: 25 March 2015 08:55
> To: Tim Bell
> Cc: OpenStack Development Mailing List (not for usage questions)
> Subject: Re: [openstack-dev] [Ceilometer] Meters vs. Metrics
> On Tue, Mar 24 2015, Tim Bell wrote:
> > Can we keep it consistent ? The APIs have meter in them, so do the
> > CLIs so we should really stick to that convention.
> It should be consistent already, as picked terms years ago.
> Meters represents a set of samples with the same meter_name.
> There's no metrics in Ceilometer.

Unfortunately, this is a cause of confusion for the users. Do you have a reference to the differences in the concepts ?

The ceilometer doc does also have this confusion in some places, for example, http://docs.openstack.org/developer/ceilometer/measurements.html mixes the terms.

Existing meters

For the list of existing metrics see the tables under the Measurements page of Ceilometer in the Cloud Administrator Guide.


> > If Gnocchi is using metrics, I feel it should change to use meters or
> > a V3 API proposed that changes it all.
> Gnocchi is using metrics to differ from Ceilometer's meters because they are not
> the same "concept".
> --
> Julien Danjou
> // Free Software hacker
> // http://julien.danjou.info

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