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https://issues.apache.org/jira/browse/HDFS-1451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510654#comment-13510654
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Harsh J commented on HDFS-1451:
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Could you also post some use-cases behind this? What would drive one to use
different placement policies for different files in general?
> Extend the pluggable block placement policy interface to handle/allow
> file-level intelligence
> ---------------------------------------------------------------------------------------------
>
> Key: HDFS-1451
> URL: https://issues.apache.org/jira/browse/HDFS-1451
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 0.21.0
> Reporter: Harold Lim
>
> The current pluggable block placement policy interface
> (https://issues.apache.org/jira/browse/HDFS-385) sets the policy globally. I
> propose to have this interface be extended to allow setting the policy on a
> file-level basis. For example, there may be cases where certain files may
> simply need the default policy and certain other files need more complex
> block placement policies.
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