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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7382) Port ZK.multi support from HBASE-6775 to 0.96
Date Fri, 25 Jan 2013 00:57:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13562235#comment-13562235
] 

Ted Yu commented on HBASE-7382:
-------------------------------

Himanshu beat me :-) How about using the following (referring to HBASE-2611):
All the active region servers try to "move" the logs of peers under the dead regionserver
znode. It involves creating Op objects for creating new znodes and deleting old ones. As per
the multi API guarantee, only one regionserver will be successful in moving the znodes.
                
> Port ZK.multi support from HBASE-6775 to 0.96
> ---------------------------------------------
>
>                 Key: HBASE-7382
>                 URL: https://issues.apache.org/jira/browse/HBASE-7382
>             Project: HBase
>          Issue Type: Bug
>          Components: Zookeeper
>            Reporter: Gregory Chanan
>            Assignee: Himanshu Vashishtha
>            Priority: Critical
>             Fix For: 0.96.0
>
>         Attachments: 7382-trunk-v3.txt, 7382-trunk-v4.txt, HBASE-7382-trunk.patch
>
>
> HBASE-6775 adds support for ZK.multi ZKUtil and uses it for the 0.92/0.94 compatibility
fix implemented in HBASE-6710.
> ZK.multi support is most likely useful in 0.96, but since HBASE-6710 is not relevant
for 0.96, perhaps we should find another use case first before we port.

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