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From "Ivan Kelly (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4266) BKJM: Separate write and ack quorum
Date Thu, 10 Jul 2014 16:48:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14057654#comment-14057654
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Ivan Kelly commented on HDFS-4266:
----------------------------------

Looks good to me, but the test could be a little flakey as it seems to rely on the fact that
it will finish before the client socket read timeout triggers, which would cause the client
to try to replace the sleeping bookie, and then fail because it can't build an ensemble. This
behaviour is something we plan to change (if you have ack quorum, the client shouldn't fail)
but we haven't done so yet.

> BKJM: Separate write and ack quorum
> -----------------------------------
>
>                 Key: HDFS-4266
>                 URL: https://issues.apache.org/jira/browse/HDFS-4266
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>            Reporter: Ivan Kelly
>            Assignee: Rakesh R
>         Attachments: 001-HDFS-4266.patch, 002-HDFS-4266.patch
>
>
> BOOKKEEPER-208 allows the ack and write quorums to be different sizes to allow writes
to be unaffected by any bookie failure. BKJM should be able to take advantage of this.



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