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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5753) Add new NN startup options for downgrade and rollback using upgrade marker
Date Fri, 10 Jan 2014 06:16:52 GMT
Tsz Wo (Nicholas), SZE created HDFS-5753:
--------------------------------------------

             Summary: Add new NN startup options for downgrade and rollback using upgrade
marker 
                 Key: HDFS-5753
                 URL: https://issues.apache.org/jira/browse/HDFS-5753
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Tsz Wo (Nicholas), SZE


Namenode could be started up with -upgrade / -rollback.  The -rollback option will restore
the data using the previous directory.  New options are needed for downgrade and rollback
using the upgrade marker.



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