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https://issues.apache.org/jira/browse/HBASE-12975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14365530#comment-14365530
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Andrew Purtell commented on HBASE-12975:
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Thanks for the pointer [~jamestaylor], I had not seen that issue yet.
So [~rajeshbabu], it looks ok to proceed with this patch as-is. We could even
drop the listener interface, but I suppose that could be independently useful,
even though there would be no user for it today. Should we need to group more
than one SplitTransaction into an uber-transaction, we can enhance the API with
something like the "SplitTransactions" suggestion I made above.
Unless I hear otherwise I will refresh the current patch and get it ready for
review for commit.
> 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
>
>
> 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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