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https://issues.apache.org/jira/browse/PHOENIX-1637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14307519#comment-14307519
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Andrew Purtell commented on PHOENIX-1637:
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Also note that should HBase ever support a split META, and Yahoo has a patch in
the works to bring that back IIRC, then what we do today won't be sufficient,
we will have to do distributed atomic META changes by coordinating among
MetadataEndpointImpls.
> Use supported region locking protocols when available
> -----------------------------------------------------
>
> Key: PHOENIX-1637
> URL: https://issues.apache.org/jira/browse/PHOENIX-1637
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Andrew Purtell
>
> Another major use of HRegion methods in Phoenix is locking. HBase has
> proposed adding a Region interface, which would be a supportable subset of
> HRegion methods applications like Phoenix may need. If it exposes read
> (region) and write (row) locks then we can use them:
> - Where we lock META rows when making transactional changes to system tables
> - When we process aggregates, sequences, and index or system table updates
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