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https://issues.apache.org/jira/browse/HBASE-6721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14709846#comment-14709846
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Andrew Purtell commented on HBASE-6721:
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bq. Let me know if you'd like me to break these up into separate patches.
Yes, let's do that. Now that we have feature branches with the previous patches
posted here committed, all new work are addendums. It's best IMHO if the
addendums have their own JIRA identifiers so we can collect patches and any
discussion for each on separate tickets instead of all lumped in here.
bq. 1. Forward port some changes from 0.98 feature branch
This needs committing to the master branch only. I suggest opening a subtask
for it.
bq. 2. Address CP backward compatibility support
This needs committing to both master and 0.98 branches. Work should be done on
HBASE-14232. Pretty sure we will need two patches, one for master, one for 0.98
bq. 3. Address removal of GroupAdmin and GroupAdminClient and moving the apis
to Admin.
This needs committing to both master and 0.98 branches. Work should be done on
HBASE-14226. Pretty sure we will need two patches, one for master, one for 0.98
> 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
> GroupBasedLoadBalancer Sequence Diagram.xml, HBASE-6721-DesigDoc.pdf,
> HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf, HBASE-6721-DesigDoc.pdf,
> HBASE-6721_0.98_2.patch, HBASE-6721_10.patch, HBASE-6721_11.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, balanceCluster Sequence Diagram.svg,
> immediateAssignments Sequence Diagram.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 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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