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https://issues.apache.org/jira/browse/CASSANDRA-7974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Lohfink updated CASSANDRA-7974:
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Attachment: CASSANDRA-7974v5.txt
Fixed in v5 an issue - the byte array it was using was not checked for equality
in the StreamSummary so the same key may show up as duplicates.
> Enable tooling to detect hot partitions
> ---------------------------------------
>
> Key: CASSANDRA-7974
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7974
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Brandon Williams
> Assignee: Chris Lohfink
> Fix For: 2.1.3
>
> Attachments: 7974.txt, CASSANDRA-7974v3.txt, CASSANDRA-7974v4.txt,
> CASSANDRA-7974v5.txt, cassandra-2.1-7974v2.txt
>
>
> Sometimes you know you have a hot partition by the load on a replica set, but
> have no way of determining which partition it is. Tracing is inadequate for
> this without a lot of post-tracing analysis that might not yield results.
> Since we already include stream-lib for HLL in compaction metadata, it
> shouldn't be too hard to wire up topK for X seconds via jmx/nodetool and then
> return the top partitions hit.
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