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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6930) [89-fb] Avoid acquiring the same row lock repeatedly
Date Thu, 04 Oct 2012 00:05:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469004#comment-13469004
] 

Phabricator commented on HBASE-6930:
------------------------------------

mbautin has closed the revision "[jira] [HBASE-6930] [89-fb] Fix TestThriftServerLegacy: notifyAll
should be inside synchronized block, and a null checkAndMutate expected value should be handled
correctly".

CHANGED PRIOR TO COMMIT
  https://reviews.facebook.net/D5841?vs=19251&id=19293#differential-review-toc

REVISION DETAIL
  https://reviews.facebook.net/D5841

COMMIT
  https://reviews.facebook.net/rHBASEEIGHTNINEFBBRANCH1393839

To: Kannan, Liyin, Karthik, JIRA, mbautin

                
> [89-fb] Avoid acquiring the same row lock repeatedly
> ----------------------------------------------------
>
>                 Key: HBASE-6930
>                 URL: https://issues.apache.org/jira/browse/HBASE-6930
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Liyin Tang
>         Attachments: D5841.1.patch, D5841.2.patch
>
>
> When processing the multiPut, multiMutations or multiDelete operations, each IPC handler
thread tries to acquire a lock for each row key in these batches. If there are duplicated
row keys in these batches, previously the IPC handler thread will repeatedly acquire the same
row key again and again.
> So the optimization is to sort each batch operation based on the row key in the client
side, and skip acquiring the same row lock repeatedly in the server side.

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