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https://issues.apache.org/jira/browse/HDFS-7891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Walter Su updated HDFS-7891:
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Attachment: (was: HDFS-7891.003.patch)
> A block placement policy with best rack failure tolerance
> ---------------------------------------------------------
>
> Key: HDFS-7891
> URL: https://issues.apache.org/jira/browse/HDFS-7891
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: namenode
> Reporter: Walter Su
> Assignee: Walter Su
> Priority: Minor
> Attachments: HDFS-7891.004.patch, HDFS-7891.005.patch
>
>
> a block placement policy tries its best to place replicas to most racks.
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