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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.
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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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