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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10351) LoadBalancer changes for supporting region replicas
Date Thu, 20 Feb 2014 19:15:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13907343#comment-13907343
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Sergey Shelukhin commented on HBASE-10351:
------------------------------------------

Left some comments yesterday and today... I didn't review tests very carefully. The rest seems
ok (except where noted) although the array manipulations are rather complex and meaning is
not always clear, so I might have missed something. In general more comments would help :)

> LoadBalancer changes for supporting region replicas
> ---------------------------------------------------
>
>                 Key: HBASE-10351
>                 URL: https://issues.apache.org/jira/browse/HBASE-10351
>             Project: HBase
>          Issue Type: Sub-task
>          Components: master
>    Affects Versions: 0.99.0
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>         Attachments: hbase-10351_v0.patch, hbase-10351_v1.patch, hbase-10351_v3.patch
>
>
> LoadBalancer has to be aware of and enforce placement of region replicas so that the
replicas are not co-hosted in the same server, host or rack. This will ensure that the region
is highly available during process / host / rack failover. 



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