[jira] [Commented] (HDFS-4076) Support snapshot of single files

["Suresh Srinivas (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-4076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13479581#comment-13479581 ] 

Suresh Srinivas commented on HDFS-4076:
---------------------------------------

# 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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