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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5970) Improve the AssignmentManager#updateTimer and speed up handling opened event
Date Wed, 30 May 2012 23:49:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286197#comment-13286197
] 

stack commented on HBASE-5970:
------------------------------

What do we need to do to get this patch in?  Can you update it for trunk please Chunhui so
we can rerun it by hadoopqa.

On the javadoc suggestion?  I'm not sure what you'd write but write something that makes sense
(the javadoc as is is nonesensical).


                
> 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
>         Attachments: 5970v3.patch, HBASE-5970.patch, HBASE-5970v2.patch, HBASE-5970v3.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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