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Date: Tue, 22 Mar 2011 18:54:05 +0000 (UTC)
From: "Jean-Daniel Cryans (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-3681) Check the sloppiness of the region
 load before balancing
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    [ https://issues.apache.org/jira/browse/HBASE-3681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13009781#comment-13009781 ] 

Jean-Daniel Cryans commented on HBASE-3681:
-------------------------------------------

Ah I see, then I think it would be better to create a constructor for LoadBalancer and pass the HBC.

> Check the sloppiness of the region load before balancing
> --------------------------------------------------------
>
>                 Key: HBASE-3681
>                 URL: https://issues.apache.org/jira/browse/HBASE-3681
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.1
>            Reporter: Jean-Daniel Cryans
>            Assignee: Ted Yu
>             Fix For: 0.92.0
>
>         Attachments: hbase-3681.txt
>
>
> Per our discussion at the hackathon today, it seems that it would be more helpful to add a sloppiness check before doing the normal balancing.
> The current situation is that the balancer always tries to get the region load even, meaning that there can be some very frequent regions movement.
> Setting the balancer to run less often (like every 4 hours) isn't much better since the load could get out of whack easily.
> This is why running the normal balancer frequently, but first checking for some sloppiness in the region load across the RS, seems like a more viable option.

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