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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-15005) Support meta tag element in Hadoop XML configurations
Date Wed, 01 Nov 2017 16:13:01 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated HADOOP-15005:
------------------------------------
    Summary: Support meta tag element in Hadoop XML configurations  (was: Support meta tags
in configs)

> Support meta tag element in Hadoop XML configurations
> -----------------------------------------------------
>
>                 Key: HADOOP-15005
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15005
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: Ajay Kumar
>            Assignee: Ajay Kumar
>            Priority: Major
>             Fix For: 3.1.0
>
>         Attachments: HDFS-12350.01.patch, HDFS-12350.02.patch, HDFS-12350.03.patch
>
>
> We should tag the hadoop/hdfs config so that we can retrieve properties by there usage/application
like PERFORMANCE, NAMENODE etc. Right now we don't have an option available to group or list
related properties together. 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 file with tags.
> {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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