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https://issues.apache.org/jira/browse/CASSANDRA-4537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433833#comment-13433833
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Brandon Williams commented on CASSANDRA-4537:
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I would go one further and say it should be available via nodetool
compactionstats. I can't count the number of times I've had to paste a python
script that prints level counts.
> We should emit number of sstables in each level from JMX
> --------------------------------------------------------
>
> Key: CASSANDRA-4537
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4537
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 1.2
> Reporter: sankalp kohli
> Priority: Minor
> Labels: compaction, leveled
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> We should add methods to this Mbean
> org.apache.cassandra.db.ColumnFamilyStoreMBean
> These metrics will be helpful to see how sstables are distributed in
> different levels and how they move to higher level with time.
> Currently we can see this by looking at the json file but with JMX, we can
> monitor the historic values over time using any monitoring tool.
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