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From "Brandon Williams (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-7273) expose global ColumnFamily metrics
Date Tue, 24 Jun 2014 17:37:24 GMT


Brandon Williams commented on CASSANDRA-7273:

Oh, I see now.  The ones that were zero (not empty, poor choice of wording on my part) were
actually supposed to be zero at the time.

> expose global ColumnFamily metrics
> ----------------------------------
>                 Key: CASSANDRA-7273
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Richard Wagner
>            Assignee: Chris Lohfink
>            Priority: Minor
>              Labels: lhf
>             Fix For: 1.2.17
>         Attachments: 7273-2_1_branch-v1.txt, 7273-2_1_branch-v2.txt, Screen Shot 2014-06-24
at 11.52.41 AM.png, Screen Shot 2014-06-24 at 11.53.47 AM.png, v2.tar
> It would be very useful to have cassandra expose ColumnFamily metrics that span all column
families. A general purpose cassandra monitoring system built up around the current ColumnFamily
metrics really only has a couple of choices right now: publish metrics for all column families
or fetch metrics for all column families, aggregate them and then publish the aggregated metrics.
The first can be quite expensive for the downstream monitoring system and the second is a
piece of work that it seems is better pushed into cassandra itself.
> Perhaps these global ColumnFamily metrics could be published under a name of:
> org.apache.cassandra.metrics:type=(ColumnFamily|IndexColumnFamily),name=(Metric name)
> (Same as existing ColumnFamily metrics, but with no keyspace or scope.)

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