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https://issues.apache.org/jira/browse/BOOKKEEPER-592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681003#comment-13681003
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Hadoop QA commented on BOOKKEEPER-592:
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Testing JIRA BOOKKEEPER-592
Patch
[BOOKKEEPER-592.patch|https://issues.apache.org/jira/secure/attachment/12587372/BOOKKEEPER-592.patch]
downloaded at Wed Jun 12 06:59:01 UTC 2013
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{color:red}-1{color} Patch failed to apply to head of branch
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> allow application to recommend ledger data locality
> ---------------------------------------------------
>
> Key: BOOKKEEPER-592
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-592
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Ming Ma
> Assignee: Sijie Guo
> Fix For: 4.3.0
>
> Attachments: bookkeeper-592.patch, BOOKKEEPER-592.patch,
> BOOKKEEPER-592.patch, BOOKKEEPER-592.patch, BOOKKEEPER-592.patch
>
>
> For application like hbase WAL, it will be useful if application like hbase
> can give a hint to bk about application's preferred ledger location. In that
> way, application can fail over to specific machines where one of the ledger
> replica is located; the recovery time will be faster. Another scenario is
> hbase's support for hot standby region server where read request can be
> served from a different machine other than the active region server. That
> requires the hot standby region server to read from ledger. If the ledger is
> on the same machine as standby region server, the performance will be better.
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