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https://issues.apache.org/jira/browse/HDFS-4076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13479581#comment-13479581
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Suresh Srinivas commented on HDFS-4076:
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# INodeFileWithLink
#* class javadoc should be more clearer - "INodeFile of an original file that
is snapshotted."
#* Please document the next element and indicate how this will be used for
circular link etc.
# InodeFileSnapLink.java
#* "INode for snapshot files" -> INode representing a snapshot of a file.
#* "The file size at creation time" can you change this to "The file size at
snapshot time"?
#* Instead of InodeFileSnapLink, INodeFileSnapshot may be a better name and
easier to understand. Based on this the method name in FSDirectory also needs
to change.
+1 with these changes.
> 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
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h4076_20121018.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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