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https://issues.apache.org/jira/browse/HADOOP-15164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hanisha Koneru resolved HADOOP-15164.
-------------------------------------
    Resolution: Duplicate

> DataNode Replica Trash
> ----------------------
>
>                 Key: HADOOP-15164
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15164
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: Hanisha Koneru
>            Assignee: Hanisha Koneru
>         Attachments: DataNode_Replica_Trash_Design_Doc.pdf
>
>
> DataNode Replica Trash will allow administrators to recover from a recent 
> delete request that resulted in catastrophic loss of user data. This is 
> achieved by placing all invalidated blocks in a replica trash on the datanode 
> before completely purging them from the system. The design doc is attached 
> here.



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