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https://issues.apache.org/jira/browse/HADOOP-5670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852633#action_12852633
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Alex Newman commented on HADOOP-5670:
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Howdy, 

This is really exciting as I feel currently  that configs are a hard problem. 
Currently it can be difficult to get transparency and flexibility depending on 
the configs scope. Specifically, where do I audit if a user sets a particular 
job paramater, or an admin sets a paramater for a particular system. It seems 
that this jira is about setting up scope on a cluster wide basis. LDAP and 
Zookeeper could allow configs across clusters. 

This is something that gasp vms logicals got right IMO in that it is one 
interface to solve all of these problems. I think one giant key value store is 
a good first step, but realistically you need different permissions based on if 
you are making a change intra cluster, inter cluster, for one box, for one user 
or for one job. Being able to go back and see what the hierarchy of those 
values, and having them being centrally managed would be really neat. Just my 
two cents, I am just spoiled from my slow big machines.

> 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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