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https://issues.apache.org/jira/browse/HDFS-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12873046#action_12873046
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Philip Zeyliger commented on HDFS-1179:
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Conceptually, this could be a side output of whoever rolls up the image+edits 
files into a new image, yes?

-- Philip

> Implement a file change log
> ---------------------------
>
>                 Key: HDFS-1179
>                 URL: https://issues.apache.org/jira/browse/HDFS-1179
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>
> The File Change Log (FCL) is a construct that records all metadata changes in 
> a file system (http://en.wikipedia.org/wiki/File_change_log). This JIRA is to 
> discuss various high-level approaches to implementing such a FCL for HDFS.

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