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From "Zhihong Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6496) Example ZK based scan policy
Date Tue, 07 Aug 2012 21:07:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13430624#comment-13430624
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Zhihong Ted Yu commented on HBASE-6496:
---------------------------------------

w.r.t. putIfAbsent(), I meant if you use re.getSharedData().putIfAbsent() directly, you don't
need the containsKey() check.
ZKWatcher needs to be disposed of in case an entry already existed in shared data.
                
> Example ZK based scan policy
> ----------------------------
>
>                 Key: HBASE-6496
>                 URL: https://issues.apache.org/jira/browse/HBASE-6496
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.96.0, 0.94.2
>
>         Attachments: 6496-v2.txt, 6496.txt
>
>
> Provide an example of a RegionServer that listens to a ZK node to learn about what set
of KVs can safely be deleted during a compaction.

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