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https://issues.apache.org/jira/browse/HDFS-531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12748214#action_12748214
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Owen O'Malley commented on HDFS-531:
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I agree with all of Tom's comments.

1. all topology stuff belongs in net.topology.
2. leave hadoop.tmp.dir alone
3. distributed cache should be mapred
4. I think we should pass on the dfs to hdfs. It would be nice, but I don't 
think it is worth it.

I think dfs.max.replication.streams and dfs.heartbeat.recheck.interval should 
have a more specific context? dfs.namenode.*?

> Renaming of configuration keys
> ------------------------------
>
>                 Key: HDFS-531
>                 URL: https://issues.apache.org/jira/browse/HDFS-531
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Jitendra Nath Pandey
>            Assignee: Jitendra Nath Pandey
>             Fix For: 0.21.0
>
>         Attachments: changed_config_keys.txt
>
>
> Keys in configuration files should be standardized so that key names reflect 
> the components they are used in.
> For example:
>    dfs.backup.address should be renamed to dfs.namenode.backup.address 
>    dfs.data.dir   should be renamed to dfs.datanode.data.dir
> This change will impact both hdfs and common sources.
> Following convention is proposed:
> 1. Any key related hdfs should begin with 'dfs'.
> 2. Any key related to namenode, datanode or client should begin with 
> dfs.namenode, dfs.datanode or dfs.client respectively.  

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