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Need explanations about some Ceilometer terms

asked 2014-04-25 17:55:24 -0500

HachDev gravatar image

updated 2014-04-25 17:57:24 -0500

Hi everyone

i just need to know what is the meaning of "sum"," count","period","sample" int the response of a meter statitstics request???

What the relation between sum and count ,why im always getting that sum=count ???????

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answered 2014-05-05 20:52:39 -0500

doyleratcisco gravatar image

Looking at the full output of "ceilometer statistics" ...

ceilometer statistics -m cpu_util -q resource_id=your_resource_id_here

Period = Length in seconds for the sample window size. If not specified, the period = 0 which means show the full start to end sample. Use the "-p seconds" to show statistics based on a given window size.

Count = How many individual samples are available. When combined with -p usage, the count should increase/decrease as the period gets smaller/larger.

Sum = Just that. Sum of all the samples for the given meter.

As far as I know, there is no specific "sample" field in the "ceilometer statistics" command. However, for the "ceilometer statistics" command noted, we are using all the cpu_util metrics recorded (so, a full sample set) for the given resource ID.

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answered 2014-05-06 11:10:26 -0500

jpichon gravatar image

Personally, I found the explanations on this page very useful to explain some of the basic concepts: http://openstack.redhat.com/Ceilomete... . Maybe they'll be of help to you as well.

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Asked: 2014-04-25 17:55:24 -0500

Seen: 175 times

Last updated: May 06 '14