Hanisha Koneru created HADOOP-15164:
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             Summary: 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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