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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/08/18 22:24:14 UTC
[jira] Updated: (HBASE-1676) load balancing on a large cluster
doesn't work very well
[ https://issues.apache.org/jira/browse/HBASE-1676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-1676:
-------------------------
Fix Version/s: (was: 0.20.1)
0.21.0
Too big to fix in a point release. Moving to 0.21.
> load balancing on a large cluster doesn't work very well
> --------------------------------------------------------
>
> Key: HBASE-1676
> URL: https://issues.apache.org/jira/browse/HBASE-1676
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.20.0
> Reporter: ryan rawson
> Fix For: 0.21.0
>
>
> I have 200 regions per server in my cluster. When I take one down, then bring it back up, I only end up with about 30 regions assigned to it. This is highly reproducible.
> Furthermore, the assignment algorithm will do silly things like assign all regions of a table to one regionserver - even if it's the best server. We need to be smarter about optimizing how regions are assigned if we want to achieve maximal performance on our clusters.
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