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Date: Tue, 30 Oct 2012 21:38:14 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-5970) Improve the
 AssignmentManager#updateTimer and speed up handling opened event
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    [ https://issues.apache.org/jira/browse/HBASE-5970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487271#comment-13487271 ] 

Hudson commented on HBASE-5970:
-------------------------------

Integrated in HBase-0.94 #560 (See [https://builds.apache.org/job/HBase-0.94/560/])
    HBASE-7038 Port HBASE-5970 Improve the AssignmentManager#updateTimer and speed up handling opened event to 0.94 (Sergey Shelukhin) (Revision 1403787)

     Result = SUCCESS
tedyu : 
Files : 
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java

                
> Improve the AssignmentManager#updateTimer and speed up handling opened event
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-5970
>                 URL: https://issues.apache.org/jira/browse/HBASE-5970
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>            Priority: Critical
>             Fix For: 0.96.0
>
>         Attachments: 5970v3.patch, HBASE-5970.patch, HBASE-5970v2.patch, HBASE-5970v3.patch, HBASE-5970v4.patch, HBASE-5970v4.patch
>
>
> We found handing opened event very slow in the environment with lots of regions.
> The problem is the slow AssignmentManager#updateTimer.
> We do the test for bulk assigning 10w (i.e. 100k) regions, the whole process of bulk assigning took 1 hours.
> 2012-05-06 20:31:49,201 INFO org.apache.hadoop.hbase.master.AssignmentManager: Bulk assigning 100000 region(s) round-robin across 5 server(s)
> 2012-05-06 21:26:32,103 INFO org.apache.hadoop.hbase.master.AssignmentManager: Bulk assigning done
> I think we could do the improvement for the AssignmentManager#updateTimer: Make a thread do this work.
> After the improvement, it took only 4.5mins
> 2012-05-07 11:03:36,581 INFO org.apache.hadoop.hbase.master.AssignmentManager: Bulk assigning 100000 region(s) across 5 server(s), retainAssignment=true 
> 2012-05-07 11:07:57,073 INFO org.apache.hadoop.hbase.master.AssignmentManager: Bulk assigning done 

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