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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2011/03/08 08:14:59 UTC

[jira] Commented: (HBASE-3609) Improve the selection of regions to balance; part 2

    [ https://issues.apache.org/jira/browse/HBASE-3609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003842#comment-13003842 ] 

Ted Yu commented on HBASE-3609:
-------------------------------

hbase-3609.txt implemented first part of the idea expressed in HBASE-3586 @ 06/Mar/11 07:10
The alternation between head and tail of regions list happens after each addition to regionsToMove. So this should provide good distribution of young and old regions.

The implementation for second part needs more refinement because regionsToMove is manipulated in three loops in balanceCluster().

TestLoadBalancer passes.

Please review.

> Improve the selection of regions to balance; part 2
> ---------------------------------------------------
>
>                 Key: HBASE-3609
>                 URL: https://issues.apache.org/jira/browse/HBASE-3609
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: Ted Yu
>         Attachments: hbase-3609.txt
>
>
> See 'HBASE-3586  Improve the selection of regions to balance' for discussion of algorithms that improve on current random assignment.

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