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Posted to commits@cassandra.apache.org by "Sylvain Lebresne (Commented) (JIRA)" <ji...@apache.org> on 2011/10/20 14:27:10 UTC

[jira] [Commented] (CASSANDRA-3386) Avoid lock contention in hint rows

    [ https://issues.apache.org/jira/browse/CASSANDRA-3386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131552#comment-13131552 ] 

Sylvain Lebresne commented on CASSANDRA-3386:
---------------------------------------------

Looks good to me though I haven't been able to apply the patch cleanly somehow, against what is it supposed to be ?
                
> Avoid lock contention in hint rows
> ----------------------------------
>
>                 Key: CASSANDRA-3386
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3386
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.7.0
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 0.8.8, 1.0.1
>
>         Attachments: 3386.txt
>
>
> As pointed out by Yang in CASSANDRA-3385, hint writes are keyed by target IP, to make replay efficient. However, this means that we'll hit a lot of lock contention in table.apply where we synchronize for potential index updates.

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