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From "Francis Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6721) RegionServer Group based Assignment
Date Fri, 26 Apr 2013 22:42:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13643333#comment-13643333
] 

Francis Liu commented on HBASE-6721:
------------------------------------

[~saint.ack@gmail.com] I've updated the doc. Addressing your questions. Let me me know if
it's missing anything else.


                
> RegionServer Group based Assignment
> -----------------------------------
>
>                 Key: HBASE-6721
>                 URL: https://issues.apache.org/jira/browse/HBASE-6721
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Francis Liu
>            Assignee: Vandana Ayyalasomayajula
>             Fix For: 0.95.1
>
>         Attachments: 6721-master-webUI.patch, HBASE-6721_8.patch, HBASE-6721_94_2.patch,
HBASE-6721_94_3.patch, HBASE-6721_94_3.patch, HBASE-6721_94_4.patch, HBASE-6721_94_5.patch,
HBASE-6721_94_6.patch, HBASE-6721_94_7.patch, HBASE-6721_94.patch, HBASE-6721_94.patch, HBASE-6721-DesigDoc.pdf,
HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf, HBASE-6721_trunk.patch,
HBASE-6721_trunk.patch, HBASE-6721_trunk.patch
>
>
> In multi-tenant deployments of HBase, it is likely that a RegionServer will be serving
out regions from a number of different tables owned by various client applications. Being
able to group a subset of running RegionServers and assign specific tables to it, provides
a client application a level of isolation and resource allocation.
> The proposal essentially is to have an AssignmentManager which is aware of RegionServer
groups and assigns tables to region servers based on groupings. Load balancing will occur
on a per group basis as well. 
> This is essentially a simplification of the approach taken in HBASE-4120. See attached
document.

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