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Date: Fri, 12 Apr 2013 21:18:16 +0000 (UTC)
From: "Enis Soztutar (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12637129.1363315640620.159899.1365801496506@arcas>
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References: <JIRA.12637129.1363315640620@arcas>
Subject: [jira] [Updated] (HBASE-8119) Optimize StochasticLoadBalancer
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     [ https://issues.apache.org/jira/browse/HBASE-8119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Enis Soztutar updated HBASE-8119:
---------------------------------

    Attachment: hbase-8119_addendum.patch

I think I've understood what's going on. My svn-repo was dirty with the fixes, and somehow they did not went in with the patch. You have an addendum to this, or a separate issue? 

I was thinking of committing this addendum. 
                
> Optimize StochasticLoadBalancer
> -------------------------------
>
>                 Key: HBASE-8119
>                 URL: https://issues.apache.org/jira/browse/HBASE-8119
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>    Affects Versions: 0.95.0
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>            Priority: Critical
>             Fix For: 0.98.0, 0.95.1
>
>         Attachments: hbase-8119_addendum.patch, hbase-8119_v2.patch, hbase-8119_v3.patch
>
>
> On a 5 node trunk cluster, I ran into a weird problem with StochasticLoadBalancer:
> server1 	Thu Mar 14 03:42:50 UTC 2013 	0.0 	33
> server2 	Thu Mar 14 03:47:53 UTC 2013 	0.0 	34
> server3 	Thu Mar 14 03:46:53 UTC 2013 	465.0 	42
> server4 	Thu Mar 14 03:47:53 UTC 2013 	11455.0 	282
> server5 	Thu Mar 14 03:47:53 UTC 2013 	0.0 	34
> Total:5 		11920 	425
> Notice that server4 has 282 regions, while the others have much less. Plus for one table with 260 regions has been super imbalanced:
> {code}
> Regions by Region Server
> Region Server	Region Count
> http://server3:60030/ 	10
> http://server4:60030/ 	250
> {code}

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