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https://issues.apache.org/jira/browse/HDFS-12350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ajay Kumar updated HDFS-12350:
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Attachment: (was: HDFS-12350.01.patch)
> Support meta tags in configs
> ----------------------------
>
> Key: HDFS-12350
> URL: https://issues.apache.org/jira/browse/HDFS-12350
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ajay Kumar
> Assignee: Ajay Kumar
>
> We should add meta tag extension to the hadoop/hdfs config so that we can
> retrieve properties by various tags like PERFORMANCE, NAMENODE etc. Right now
> we don't have an option available to group or list properties related to
> performance or security or datanodes. Grouping properties through some
> restricted set of Meta tags and then exposing them in Configuration class
> will be useful for end users.
> For example, here is an config with meta tag.
> {code}
> <configuration>
> <property>
> <name>dfs.namenode.servicerpc-bind-host</name>
> <value>localhost</value>
> <tag> REQUIRED </tag>
> </property>
>
> <property>
> <name>dfs.namenode.fs-limits.min-block-size</name>
> <value> 1048576 </value>
> <tag> PERFORMANCE,REQUIRED</tag>
> </property>
> <property>
> <name>dfs.namenode.logging.level</name>
> <value>Info</value>
> <tag>HDFS, DEBUG </tag>
> </property>
>
> <configuration>
> {code}
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