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Duo Zhang commented on HBASE-17507: ----------------------------------- {quote} The preAssignMvccLock is per-region level while w/o mvcc preassign the locking is per-RS level due to the sequential handling of ringbuffer {quote} Have you compared with multiwal? > Add document for the mvcc preassign feature introduced in HBASE-16698 > --------------------------------------------------------------------- > > Key: HBASE-17507 > URL: https://issues.apache.org/jira/browse/HBASE-17507 > Project: HBase > Issue Type: Task > Reporter: Yu Li > Assignee: Yu Li > > In this JIRA we will supply a design doc of the mvcc preassign mechanism > introduced in HBASE-16698, as well as more detailed performance data of it > for better reference. -- This message was sent by Atlassian JIRA (v6.3.4#6332)