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From "Allan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18144) Forward-port the old exclusive row lock; there are scenarios where it performs better
Date Fri, 02 Jun 2017 02:30:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16034046#comment-16034046
] 

Allan Yang commented on HBASE-18144:
------------------------------------

Sorry, stack,  I'm still not get it.  As you said, reentrant read/write lock is about 20%
slower than exclusive lock but locking time only takes a very small proportion in the whole
write path, why using exclusive lock improves the case?

> Forward-port the old exclusive row lock; there are scenarios where it performs better
> -------------------------------------------------------------------------------------
>
>                 Key: HBASE-18144
>                 URL: https://issues.apache.org/jira/browse/HBASE-18144
>             Project: HBase
>          Issue Type: Bug
>          Components: Increment
>    Affects Versions: 1.2.5
>            Reporter: stack
>            Assignee: stack
>             Fix For: 2.0.0, 1.3.2, 1.2.7
>
>
> Description to follow.



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