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https://issues.apache.org/jira/browse/HADOOP-5670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854083#action_12854083
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Allen Wittenauer commented on HADOOP-5670:
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bq. it would require organizations not using ldap to run additional
infrastructure to solve a problem which could be solved by something already
provided by the hadoop infrastructure. I would feel as though if we saw many
users deploying a isolated ldap installation just for hadoop that we would have
made people's life harder not easier.
If you s,LDAP,ZK,g above, you'll find it is a better fit. The cold, hard
reality is that LDAP is everywhere, ZK is not. There are some key features in
ZK that are/were missing in order for it to fit here (with the good news being
that those gaps are slowly closing). But the truth of the matter is that LDAP
is a well understood technology by most IT departments and ZK is not.
(Sidenote: it would be interesting to know how well used the security
components of ZK are...)
Also, I don't think you should think of ZK as part of the Hadoop
infrastructure. It is a sub project (and therefore part of the ecosystem), but
you can run Hadoop without using ZK and many many many people do, including
Yahoo! for years.
bq. Allen, sorry to be a pain , but could you be a bit more pedantic about what
you mean by configurations ? Do you think a hybrid system may make sense here?
I'll try and write/diagram something up with a concrete proposal as to how I
think this should be done, based on conversations I've had with Owen and others
over the years. You'll find I'm thinking way beyond just a simple 10 node
grid. :)
> 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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