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From "Alex Feinberg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5991) Introduce sequential ZNode based read/write locks
Date Thu, 26 Jul 2012 05:43:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13422909#comment-13422909
] 

Alex Feinberg commented on HBASE-5991:
--------------------------------------

Mostly done in terms of implementing the locks itself based on the recipe (with recoverable
zooKeeper). Should have this integrated into HMaster (in place of my DistributedLock code)
and have a diff ready soon.
                
> Introduce sequential ZNode based read/write locks 
> --------------------------------------------------
>
>                 Key: HBASE-5991
>                 URL: https://issues.apache.org/jira/browse/HBASE-5991
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Alex Feinberg
>            Assignee: Alex Feinberg
>
> This is a continuation of HBASE-5494:
> Currently table-level write locks have been implemented using non-sequential ZNodes as
part of HBASE-5494 and committed to 89-fb branch. This issue is to track converting the table-level
locks to sequential ZNodes and supporting read-write locks, as to solve the issue of preventing
schema changes during region splits or merges.

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