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https://issues.apache.org/jira/browse/CASSANDRA-7273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14040030#comment-14040030
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Chris Lohfink commented on CASSANDRA-7273:
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I moved the GCF metrics into bean provided in description and made the keyspace 
metrics register/cleanup in similar way.  There is a few provided by GCF that 
isnt listed in keyspace but they are mostly the ones that (like yuki mentioned) 
would have less meaning like bloom filter false positive ratio so I think its 
ok to go without them.

> expose global ColumnFamily metrics
> ----------------------------------
>
>                 Key: CASSANDRA-7273
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7273
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Richard Wagner
>            Assignee: Brandon Williams
>            Priority: Minor
>              Labels: lhf
>             Fix For: 1.2.17
>
>         Attachments: 7273-2_1_branch-v1.txt, 7273-2_1_branch-v2.txt
>
>
> 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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