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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4076) Support snapshot of single files
Date Fri, 19 Oct 2012 18:57:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480258#comment-13480258
] 

Tsz Wo (Nicholas), SZE commented on HDFS-4076:
----------------------------------------------

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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