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From "Prateek Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10099) Improve concurrency in CompactionStrategyManager
Date Thu, 15 Sep 2016 01:06:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15491965#comment-15491965
] 

Prateek Agarwal commented on CASSANDRA-10099:
---------------------------------------------

[~jjordan] Yeah, we are thinking of backporting ourselves but wanted to check whether it is
even compatible with 2.2 version (i believe it wouldn't).

> Improve concurrency in CompactionStrategyManager
> ------------------------------------------------
>
>                 Key: CASSANDRA-10099
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10099
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Yuki Morishita
>            Assignee: Marcus Eriksson
>              Labels: compaction, lcs
>             Fix For: 3.6
>
>
> Continue discussion from CASSANDRA-9882.
> CompactionStrategyManager(WrappingCompactionStrategy for <3.0) tracks SSTable changes
mainly for separating repaired / unrepaired SSTables (+ LCS manages level).
> This is blocking operation, and can lead to block of flush etc. when determining next
background task takes longer.
> Explore the way to mitigate this concurrency issue.



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