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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12350) Support meta tags in configs
Date Thu, 07 Sep 2017 20:47:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anu Engineer updated HDFS-12350:
--------------------------------
          Resolution: Fixed
        Hadoop Flags: Reviewed
       Fix Version/s: 3.1.0
    Target Version/s: 3.1.0
              Status: Resolved  (was: Patch Available)

[~ajayydv] Thank you for the contribution, I have committed this to the trunk.  Will reopen
this later to port to 3.0 branch.

> 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
>             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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