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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3609) Improve the selection of regions to balance; part 2
Date Mon, 11 Apr 2011 17:07:06 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13018438#comment-13018438
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Ted Yu commented on HBASE-3609:
-------------------------------

>From Stan Barton:
Apr 8th:
I can see that the regionserver that gets all the inserts makes pauses
time to time - I checked the log and it is because (I assume) the
regions of other tables from this RS are re-assigned elsewhere. When I
started inserting, the table was empty, now it has ~20 regions, all
assigned to one RS, that kicks the scale out property out of the
system. The insertion process is still running, if you are interested
in some other info.

Apr 11th:
I have downloaded the 0.90.2 candidate but I regret to inform you,
that it did not help to solve the issue. I am re-doing the tests and
again, all the newly created regions are being assigned to a single
RS. It is a real performance killer.

> 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: 3609-alternate.txt, 3609-empty-RS.txt, hbase-3609-by-region-age.txt,
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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