[
https://issues.apache.org/jira/browse/HBASE-6721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495015#comment-13495015
]
Ted Yu commented on HBASE-6721:
-------------------------------
More comments about GroupBasedLoadBalancer.
In randomAssignment():
{code}
+ } else if(SPECIAL_TABLES.contains(region.getTableName())){
+ candidateList = servers;
{code}
If you limit special tables to default group, there is no need to move them
after system becomes online.
For GroupStartupWorker, isOnline is set to true after waitForGroupTableOnline()
returns. In waitForGroupTableOnline():
{code}
+ if(found.get()) {
+
((GroupBasedLoadBalancer)masterServices.getLoadBalancer()).getGroupInfoManager();
+ }
{code}
Would the above call be effective (isOnline is false at this point) ?
> 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: 0.96.0
>
> Attachments: HBASE-6721_94_2.patch, HBASE-6721_94_3.patch,
> HBASE-6721_94_3.patch, HBASE-6721_94.patch, HBASE-6721_94.patch,
> HBASE-6721-DesigDoc.pdf
>
>
> 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.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
