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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-531) Renaming of configuration keys
Date Wed, 12 Aug 2009 12:17:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12742311#action_12742311

Tom White commented on HDFS-531:

* It seems wrong that there are HDFS properties in Common. Rather than dfs.networktopology.*
how about net.topology.* to reflect the fact they are in the o.a.h.net package? Also, why
not keep hadoop.tmp.dir instead of renaming it dfs.tmp.dir?
* The distributed cache is moving to MapReduce so filecache.local.cache.size, should have
a mapred prefix. See also MAPREDUCE-711.
* My preference would be that the HDFS prefix is hdfs, not dfs, to be consistent with the
protocol scheme (hdfs://) and package names (o.a.h.hdfs). But this is a big change.

> 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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