cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yuki Morishita (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10099) Improve concurrency in CompactionStrategyManager
Date Mon, 14 Mar 2016 23:37:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15194393#comment-15194393
] 

Yuki Morishita commented on CASSANDRA-10099:
--------------------------------------------

Thanks for the update. +1.

At first I thought we should remove {{while}} loop entirely from {{getNextBackgroundTask}}
also, but returning null just stops submitting background task (until that 5-min resubmit
kicks in), so for now, removing {{synchronized}} will do.


> 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.x
>
>
> 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message