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https://issues.apache.org/jira/browse/HDFS-2016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042640#comment-13042640
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Rajiv Chittajallu commented on HDFS-2016:
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By storage directories, do you mean dfs.data.dir list? If so is this jira for 
creating something like "lost+found" in hdfs?

> 1073: remove/archive unneeded/old storage files
> -----------------------------------------------
>
>                 Key: HDFS-2016
>                 URL: https://issues.apache.org/jira/browse/HDFS-2016
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: Edit log branch (HDFS-1073)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: Edit log branch (HDFS-1073)
>
>         Attachments: hdfs-2016.txt
>
>
> This JIRA is for the infrastructure that periodically scans the storage 
> directories for files that are no longer necessary and "archives" them. The 
> default archival is just to delete them, but we may implement something 
> fancier in the future (eg move to SAN or HDFS)

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