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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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