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https://issues.apache.org/jira/browse/HDFS-4167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13998131#comment-13998131
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Jing Zhao commented on HDFS-4167:
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Yeah, I think it's better to keep it as a standalone HDFS metadata operation.
Maybe as a first step, we can fail the restore operation first when we find
that we need to handle outside rename and/or file truncation? Then users can
force the command if she/he agrees with our restore semantic.
> Add support for restoring/rolling back to a snapshot
> ----------------------------------------------------
>
> Key: HDFS-4167
> URL: https://issues.apache.org/jira/browse/HDFS-4167
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Suresh Srinivas
> Assignee: Jing Zhao
> Attachments: HDFS-4167.000.patch, HDFS-4167.001.patch,
> HDFS-4167.002.patch, HDFS-4167.003.patch
>
>
> This jira tracks work related to restoring a directory/file to a snapshot.
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