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https://issues.apache.org/jira/browse/BOOKKEEPER-592?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sijie Guo updated BOOKKEEPER-592:
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Attachment: BOOKKEEPER-592.patch
- add ensemble placement policy as a client configuration setting and construct
it by reflection.
- fixed failed test cases.
> 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
>
>
> 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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