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https://issues.apache.org/jira/browse/HBASE-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14383198#comment-14383198
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Andrew Purtell commented on HBASE-12975:
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Any concerns if I commit this tomorrow to branch-1 and master (not branch-1.0
or 0.98)?
> Supportable SplitTransaction and RegionMergeTransaction interfaces
> ------------------------------------------------------------------
>
> Key: HBASE-12975
> URL: https://issues.apache.org/jira/browse/HBASE-12975
> Project: HBase
> Issue Type: Improvement
> Reporter: Rajeshbabu Chintaguntla
> Assignee: Andrew Purtell
> Fix For: 2.0.0, 1.1.0
>
> Attachments: HBASE-12975.patch, HBASE-12975.patch, HBASE-12975.patch
>
>
> Making SplitTransaction, RegionMergeTransaction limited private is required
> to support local indexing feature in Phoenix to ensure regions colocation.
> We can ensure region split, regions merge in the coprocessors in few method
> calls without touching internals like creating zk's, file layout changes or
> assignments.
> 1) stepsBeforePONR, stepsAfterPONR we can ensure split.
> 2) meta entries can pass through coprocessors to atomically update with the
> normal split/merge.
> 3) rollback on failure.
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