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https://issues.apache.org/jira/browse/HBASE-10576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14123129#comment-14123129
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stack commented on HBASE-10576:
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What is the 'shadow region feature'?
You do not answer how I turn on/off colocation.
I have read the various designs on colocated index regions. What is the plan
for landing this secondary index feature? Is it to come in piecemeal via stuff
like this intermediate change to the balancer? What changes to core are
required? Where do I read about it? Thanks.
> Custom load balancer to co-locate the regions of two tables which are having
> same split keys
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-10576
> URL: https://issues.apache.org/jira/browse/HBASE-10576
> Project: HBase
> Issue Type: Sub-task
> Components: Balancer
> Reporter: rajeshbabu
> Assignee: rajeshbabu
> Attachments: HBASE-10536_v2.patch, HBASE-10576.patch,
> HBASE-10576_shadow_regions_wip.patch
>
>
> To support local indexing both user table and index table should have same
> split keys. This issue to provide custom balancer to colocate the regions of
> two tables which are having same split keys.
> This helps in Phoenix as well.
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