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https://issues.apache.org/jira/browse/HBASE-6496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13430762#comment-13430762
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Zhihong Ted Yu edited comment on HBASE-6496 at 8/8/12 12:29 AM:
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Unnecessary ZKWatcher creation / disposal can be avoided if you have a
singleton ZKWatcher to be placed into shared data map first.
If the placement was successful, a new ZKWatcher can be created and replace the
singleton for the same key.
was (Author: [email protected]):
ZKWatcher creation / disposal can be avoided if you have a singleton
ZKWatcher to be placed into shared data map first.
If the placement was successful, a new ZKWatcher can be created and replace the
singleton for the same key.
> 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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