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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HBASE-862) region balancing is clumsy
Date Sat, 20 Sep 2008 20:49:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell reassigned HBASE-862:
------------------------------------

    Assignee: Andrew Purtell

> region balancing is clumsy
> --------------------------
>
>                 Key: HBASE-862
>                 URL: https://issues.apache.org/jira/browse/HBASE-862
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: Andrew Purtell
>
> Daniel Leffel has an install of 500 regions on 4 nodes.  He's running 0.2.0.
> On restart, load balancing is running while the 600 regions are being initially opened.
 Makes for churn.  Load balancing should wait before it cuts in.
> Have also seen on occasion that it will not find equilibrium after a restart.
> Adding a node is catastrophic.  >20% of the regions were closed and were taking the
longest time to show up on the new server.  I would think that the region balancing would
work in more sophisticated and gradual manner.

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