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https://issues.apache.org/jira/browse/HDFS-14889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16943807#comment-16943807
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Virajith Jalaparti commented on HDFS-14889:
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[~ashvin] - can you add some context as to why this is needed? from the PR, it 
looks like no one is calling the {{isProvided}} method.

> Ability to check if a block has a replica on provided storage
> -------------------------------------------------------------
>
>                 Key: HDFS-14889
>                 URL: https://issues.apache.org/jira/browse/HDFS-14889
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ashvin Agrawal
>            Assignee: Ashvin Agrawal
>            Priority: Major
>
> Provided storage (HDFS-9806) allows data on external storage systems to 
> seamlessly appear as files on HDFS. However, in the implementation today, 
> there is no easy way to distinguish a {{Block}} belonging to an external 
> provided storage volume from a block belonging to the local cluster. This 
> task simplifies this. This feature will be useful in hybrid scenarios when 
> the local cluster will host both kinds of blocks.



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