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https://issues.apache.org/jira/browse/HDFS-4076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480258#comment-13480258
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Tsz Wo (Nicholas), SZE commented on HDFS-4076:
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Hi Aaron, as you noticed, this is going to be committed to the 2802 branch. So
please take your time to review the branch later. Thank you for your future
review in advance.
> Support snapshot of single files
> --------------------------------
>
> Key: HDFS-4076
> URL: https://issues.apache.org/jira/browse/HDFS-4076
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: HDFS-2802
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h4076_20121018.patch, h4076_20121019.patch
>
>
> The snapshot of a file shares the blocks with the original file in order to
> avoid copying data. However, the snapshot file has its own metadata so that
> it could have independent permission, replication, access time, etc.
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