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https://issues.apache.org/jira/browse/HBASE-17507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15833430#comment-15833430
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Yu Li commented on HBASE-17507:
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bq. what if the order of mvcc differs from the order of wal?
A {{preAssignMvccLock}} was introduced and made {{mvcc.begin}} and
{{WAL.append}} a transaction, so this won't happen.
> 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.
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