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Posted to hdfs-issues@hadoop.apache.org by "Akira Ajisaka (JIRA)" <ji...@apache.org> on 2016/10/27 07:31:58 UTC
[jira] [Updated] (HDFS-11049) The description of
dfs.block.replicator.classname is not clear
[ https://issues.apache.org/jira/browse/HDFS-11049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Akira Ajisaka updated HDFS-11049:
---------------------------------
Hadoop Flags: Reviewed
Summary: The description of dfs.block.replicator.classname is not clear (was: The description of dfs.block.replicator.classname is not clearly)
+1, checking this in.
> The description of dfs.block.replicator.classname is not clear
> --------------------------------------------------------------
>
> 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
> Attachments: HDFS-11049.001.patch, HDFS-11049.002.patch
>
>
> 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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