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Date: Thu, 7 Jan 2016 12:20:40 +0000 (UTC)
From: "Enis Soztutar (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12606272.1346866872000.43226.1452169240021@Atlassian.JIRA>
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 <JIRA.12606272.1346866872857@arcas>
Subject: [jira] [Commented] (HBASE-6721) RegionServer Group based Assignment
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    [ https://issues.apache.org/jira/browse/HBASE-6721?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D1508=
7285#comment-15087285 ]=20

Enis Soztutar commented on HBASE-6721:
--------------------------------------

With this patch, the RS groups is completely optional and non-core. I don't=
 think having the code in a different module helps in any way. =20
The patch corresponds to the plan that Francis put up here: https://issues.=
apache.org/jira/browse/HBASE-6721?focusedCommentId=3D14728516&page=3Dcom.at=
lassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14728516=
. I thought there was an agreement already for this. We did not talk about =
having a different module in that.=20

> 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: Francis Liu
>              Labels: hbase-6721
>         Attachments: 6721-master-webUI.patch, HBASE-6721 GroupBasedLoadBa=
lancer Sequence Diagram.xml, HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.p=
df, HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf, HBASE-6721_0.98_2.pat=
ch, HBASE-6721_10.patch, HBASE-6721_11.patch, HBASE-6721_12.patch, HBASE-67=
21_13.patch, HBASE-6721_14.patch, HBASE-6721_15.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_98_1.patch, HBASE-6721_98_2.patch, HBASE-6721_=
hbase-6721_addendum.patch, HBASE-6721_trunk.patch, HBASE-6721_trunk.patch, =
HBASE-6721_trunk.patch, HBASE-6721_trunk1.patch, HBASE-6721_trunk2.patch, b=
alanceCluster Sequence Diagram.svg, hbase-6721-v15-branch-1.1.patch, hbase-=
6721-v16.patch, hbase-6721-v17.patch, hbase-6721-v18.patch, hbase-6721-v19.=
patch, hbase-6721-v20.patch, hbase-6721-v21.patch, hbase-6721-v22.patch, hb=
ase-6721-v23.patch, hbase-6721-v25.patch, immediateAssignments Sequence Dia=
gram.svg, randomAssignment Sequence Diagram.svg, retainAssignment Sequence =
Diagram.svg, roundRobinAssignment Sequence Diagram.svg
>
>
> In multi-tenant deployments of HBase, it is likely that a RegionServer wi=
ll be serving out regions from a number of different tables owned by variou=
s client applications. Being able to group a subset of running RegionServer=
s and assign specific tables to it, provides a client application a level o=
f isolation and resource allocation.
> The proposal essentially is to have an AssignmentManager which is aware o=
f RegionServer groups and assigns tables to region servers based on groupin=
gs. Load balancing will occur on a per group basis as well.=20
> This is essentially a simplification of the approach taken in HBASE-4120.=
 See attached document.


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