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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6721) RegionServer Group based Assignment
Date Tue, 17 Mar 2015 16:16:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14365417#comment-14365417
] 

Andrew Purtell commented on HBASE-6721:
---------------------------------------

It could be useful to have a list of pros and cons for coprocessor implementation vs. core
integration. Are we considering core integration as mainly code aesthetic reasons mostly,
for example, or are there significant obstacles imposed by a coprocessor implementations strategy?


> 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
>         Attachments: 6721-master-webUI.patch, HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf,
HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf, HBASE-6721_10.patch, HBASE-6721_8.patch,
HBASE-6721_9.patch, HBASE-6721_9.patch, HBASE-6721_94.patch, HBASE-6721_94.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_trunk.patch, HBASE-6721_trunk.patch,
HBASE-6721_trunk.patch, HBASE-6721_trunk1.patch, HBASE-6721_trunk2.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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