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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1029) Allow embedding leader election into the RM
Date Mon, 05 Aug 2013 21:24:48 GMT

    [ https://issues.apache.org/jira/browse/YARN-1029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13729969#comment-13729969
] 

Aaron T. Myers commented on YARN-1029:
--------------------------------------

Just to be completely explicit, this is being presented as an alternative to using a separate
ZKFC daemon?

FWIW, in HDFS we deliberately opted to not do this so that the ZKFC could be completely logically
separate from the NN, and so that the ZKFC could one day be made to monitor garbage collections
and potentially not trigger a failover if one of those were going on. We have yet to get to
the latter.
                
> Allow embedding leader election into the RM
> -------------------------------------------
>
>                 Key: YARN-1029
>                 URL: https://issues.apache.org/jira/browse/YARN-1029
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Bikas Saha
>            Assignee: Karthik Kambatla
>
> It should be possible to embed common ActiveStandyElector into the RM such that ZooKeeper
based leader election and notification is in-built. In conjunction with a ZK state store,
this configuration will be a simple deployment option.

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