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https://issues.apache.org/jira/browse/HADOOP-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12561709#action_12561709
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Hudson commented on HADOOP-2649:
--------------------------------
Integrated in Hadoop-Nightly #374 (See
[http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/374/])
> The ReplicationMonitor sleep period should be configurable
> ----------------------------------------------------------
>
> Key: HADOOP-2649
> URL: https://issues.apache.org/jira/browse/HADOOP-2649
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Priority: Blocker
> Fix For: 0.16.0
>
> Attachments: configurableReplicationPeriod.patch,
> configurableReplicationPeriod.patch
>
>
> The HDFS Namenode computes replication work for datanodes once every 3
> seconds. This should be a configurable value. On large clusters, there could
> be many many blocks in the neededReplication queue and computing replication
> work for datanodes once every 3 seconds might consume lots of CPU on namenode.
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