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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3498) Make ReplicaPlacementPolicyDefault extensible for reuse code in subclass
Date Wed, 20 Jun 2012 04:06:43 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Junping Du updated HDFS-3498:
-----------------------------

    Attachment: HDFS-3498-v2.patch

Add replica removal test in TestReplicationPolicy which seems missing before. Remove the change
to MiniDFSCluster which will put in balancer update
                
> Make ReplicaPlacementPolicyDefault extensible for reuse code in subclass
> ------------------------------------------------------------------------
>
>                 Key: HDFS-3498
>                 URL: https://issues.apache.org/jira/browse/HDFS-3498
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 1.0.0, 2.0.0-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HDFS-3498-v2.patch, HDFS-3498.patch, 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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