Gregory Chanan created HBASE-7050:
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Summary: Document locking of HRegion
Key: HBASE-7050
URL: https://issues.apache.org/jira/browse/HBASE-7050
Project: HBase
Issue Type: Task
Components: documentation, Transactions/MVCC
Reporter: Gregory Chanan
Priority: Minor
Would be good to have some documentation on the locking in HRegion. In
particular, the updateLock and the row locks.
With the optimizations that have been made, e.g. HBASE-5541 this isn't
straightforward.
When do these locks need to be held? What structures do they protect access
to? Why does the updateLock not need to be held during rollback? Those sorts
of questions.
I've started do to some of this, but haven't fully fleshed it out.
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