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https://issues.apache.org/jira/browse/HDFS-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12873089#action_12873089
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Allen Wittenauer commented on HDFS-1179:
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Agreed: this sounds exactly like the audit log facility.
But it is important to have it exist outside the HDFS as well (debugging during
a crash, security, etc), so we need to be able to do *both*.
> 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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