[jira] [Updated] (CASSANDRA-13508) Make system.paxos table compaction strategy configurable

["Aleksey Yeschenko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-13508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Yeschenko updated CASSANDRA-13508:
------------------------------------------
    Fix Version/s:     (was: 4.0)

> Make system.paxos table compaction strategy configurable
> --------------------------------------------------------
>
>                 Key: CASSANDRA-13508
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13508
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Coordination
>            Reporter: Jay Zhuang
>            Assignee: Jay Zhuang
>            Priority: Major
>              Labels: LWT, core, paxos
>             Fix For: 4.x
>
>         Attachments: test11.png, test2.png
>
>
> The default compaction strategy for {{system.paxos}} table is LCS for performance reason: CASSANDRA-7753. But for CAS heavily used cluster, the system is busy with {{system.paxos}} compaction.
> As the data in {{paxos}} table are TTL'ed, TWCS might be a better fit. In our test, it significantly reduced the number of compaction without impacting the latency too much:
> !test11.png!
> The time window for TWCS is set to 2 minutes for the test.
> Here is the p99 latency impact:
> !test2.png!
> the yellow one is LCS, the purple one is TWCS. Average p99 has about 10% increase.



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