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https://issues.apache.org/jira/browse/HADOOP-5670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853801#action_12853801
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Andrey Kuzmin commented on HADOOP-5670:
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> nodes register themselves, and their state, with ZK, allowing simple
> monitoring to be implemented
I would add (dynamic) membership-aware scheduling. It's typically far from
straightforward for a scheduler to account for nodes (re)joining group unless
there is an explicit group registration mechanism, with join/leave events
dispatched to scheduler and other interested parties.
> Hadoop configurations should be read from a distributed system
> --------------------------------------------------------------
>
> Key: HADOOP-5670
> URL: https://issues.apache.org/jira/browse/HADOOP-5670
> Project: Hadoop Common
> Issue Type: New Feature
> Components: conf
> Reporter: Allen Wittenauer
>
> Rather than distributing the hadoop configuration files to every data node,
> compute node, etc, Hadoop should be able to read configuration information
> (dynamically!) from LDAP, ZooKeeper, whatever.
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