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https://issues.apache.org/jira/browse/BOOKKEEPER-592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660485#comment-13660485
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Flavio Junqueira commented on BOOKKEEPER-592:
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This is pretty awesome, Sijie! Thanks for doing it.
When you have a chance, could you please have a look at the tests that failed
in Jenkins:
{noformat}
org.apache.bookkeeper.client.TestRackawareEnsemblePlacementPolicy.testNewEnsembleWithMultipleRacks
org.apache.bookkeeper.client.TestRackawareEnsemblePlacementPolicy.testNewEnsembleWithEnoughRacks
{noformat}
> 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
>
>
> 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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