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Posted to common-issues@hadoop.apache.org by "Junping Du (JIRA)" <ji...@apache.org> on 2012/06/04 10:46:25 UTC
[jira] [Updated] (HADOOP-8471) Make ReplicaPlacementPolicyDefault
extensible for reuse code in subclass
[ https://issues.apache.org/jira/browse/HADOOP-8471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Junping Du updated HADOOP-8471:
-------------------------------
Attachment: Hadoop-8471-BlockPlacementDefault-extensible.patch
> Make ReplicaPlacementPolicyDefault extensible for reuse code in subclass
> ------------------------------------------------------------------------
>
> Key: HADOOP-8471
> URL: https://issues.apache.org/jira/browse/HADOOP-8471
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: ha, io
> Affects Versions: 1.0.0, 2.0.0-alpha
> Reporter: Junping Du
> Assignee: Junping Du
> Attachments: Hadoop-8471-BlockPlacementDefault-extensible.patch
>
>
> ReplicaPlacementPolicy is already a pluggable component in Hadoop. A user specified ReplicaPlacementPolicy can be specified in the hdfs-site.xml configuration under the key "dfs.block.replicator.classname". However, to make it possible to reuse code in ReplicaPlacementPolicyDefault a few of its methods were changed from private to protected. ReplicaPlacementPolicy and BlockPlacementPolicyDefault are currently annotated with @InterfaceAudience.Private.
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