[Openstack-operators] [ceilometer] what is cpu_util: directly measured or derived?

Danek Duvall danek.duvall at oracle.com
Thu Nov 17 23:55:29 UTC 2016

There seem to be two different notions of cpu_util.  One is the thing
computed by the rate_of_change transformer in the cpu_sink sink defined in
pipeline.yaml, and the other is a direct measurement by the CPUUtilPollster.
The latter is masked by the former, as far as I can tell, though changing
the name in pipeline.yaml to something clever like cpu_util2 then seems to
allow both to be presented.

The telemetry-measurements page in the admin guide talk about cpu_util as
being introduced in various releases for different hypervisors as a
pollster-originated measurement), but then talking about cpu_util as being
something generated by a transformer, too.

Is this an oversight, or simply something left to operators to discover and
choose between?


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