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https://issues.apache.org/jira/browse/HBASE-71?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Duxbury updated HBASE-71:
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Attachment: 71.patch
Here's a first shot at a patch to change this. I'm confident that this doesn't
work correctly. It passes unit tests, but I haven't tested it to see if it
correctly rebalances skewed clusters. It's challenging to set up such a test,
but I'll figure something out.
> [hbase] Master should rebalance region assignments periodically
> ---------------------------------------------------------------
>
> Key: HBASE-71
> URL: https://issues.apache.org/jira/browse/HBASE-71
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: master
> Reporter: Bryan Duxbury
> Assignee: Bryan Duxbury
> Fix For: 0.2.0
>
> Attachments: 71.patch
>
>
> The master currently only does region assignments at startup or when there
> are splits or dead regionservers. This means that if you join a new
> regionserver to the cluster after startup, it does not get assigned a fair
> share of the already-served regions as you would expect. It only gets a share
> of new regions being served.
> The master should periodically check the balance of regions, based on
> whatever assignment function, instead of in reaction to the above listed
> events.
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