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Posted to issues@kylin.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2018/09/22 02:37:00 UTC

[jira] [Commented] (KYLIN-3417) Consider replacing ReentrantReadWriteLock with StampedLock

    [ https://issues.apache.org/jira/browse/KYLIN-3417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16624443#comment-16624443 ] 

Ted Yu commented on KYLIN-3417:
-------------------------------

For phase I, we don't need to use Optimistic read lock

> Consider replacing ReentrantReadWriteLock with StampedLock
> ----------------------------------------------------------
>
>                 Key: KYLIN-3417
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3417
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: jiatao.tao
>            Priority: Major
>             Fix For: Backlog
>
>
> ReentrantReadWriteLock's are only the right solution when there is long hold time due to expensive I/O.
> It is expensive for readers.
> We should see if the lighter {{StampedLock}} can be used instead.



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