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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11049) The description of dfs.block.replicator.classname is not clearly
Date Tue, 25 Oct 2016 08:50:58 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Yiqun Lin updated HDFS-11049:
    Status: Patch Available  (was: Open)

Attach a initial patch.

> The description of dfs.block.replicator.classname is not clearly
> ----------------------------------------------------------------
>                 Key: HDFS-11049
>                 URL: https://issues.apache.org/jira/browse/HDFS-11049
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>            Priority: Minor
> Now the description of the property {{dfs.block.replicator.classname}} seems not clearly.
The current description:
> {code}
> <property>
>   <name>dfs.block.replicator.classname</name>  <value>org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicyDefault</value>
>   <description>
>     Class representing block placement policy for non-striped files.
>   </description>
> </property>
> {code}
> It seems too simple and the users will not get the other available block placement policies
and its usage. For example in HDFS-7541, it introduced     a new policy {{BlockPlacementPolicyWithUpgradeDomain}}.
This policy can be good used in rolling upgrade opeations.
> In addition, I don't find other documentations that concretely introducing the existing
placement policies. This JIRA foucus on making a improvement for this in file {{hdfs-default.xml}}.

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