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Posted to dev@bookkeeper.apache.org by "Flavio Junqueira (JIRA)" <ji...@apache.org> on 2012/05/04 15:44:48 UTC

[jira] [Commented] (BOOKKEEPER-235) Bad syncing in entrylogger degrades performance for many concurrent ledgers

    [ https://issues.apache.org/jira/browse/BOOKKEEPER-235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13268360#comment-13268360 ] 

Flavio Junqueira commented on BOOKKEEPER-235:
---------------------------------------------

The description refers to EntryLogger flush synchronizing on the wrong object, but the patch changes a synchronization block in InterleavedLedgerStore. For InterleavedLedgerStore flush, it is only called from Bookie SyncThread, and I'm not convinced that it is ok to change the synchronized block like that.
                
> Bad syncing in entrylogger degrades performance for many concurrent ledgers
> ---------------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-235
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-235
>             Project: Bookkeeper
>          Issue Type: Bug
>            Reporter: Ivan Kelly
>            Assignee: Ivan Kelly
>            Priority: Blocker
>             Fix For: 4.1.0
>
>         Attachments: BOOKKEEPER-235.diff
>
>
> EntryLogger flush syncs on the wrong object, which really hurts performance.

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