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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5848) Add a DatanodeCommand to inform datanodes that rolling upgrade is in progress
Date Wed, 29 Jan 2014 20:36:24 GMT
Tsz Wo (Nicholas), SZE created HDFS-5848:
--------------------------------------------

             Summary: Add a DatanodeCommand to inform datanodes that rolling upgrade is in
progress
                 Key: HDFS-5848
                 URL: https://issues.apache.org/jira/browse/HDFS-5848
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Tsz Wo (Nicholas), SZE
            Assignee: Tsz Wo (Nicholas), SZE


When rolling upgrade is in progress, NN should inform datanodes via heartbeat responses so
that datanode should create hardlinks when deleting blocks.  We need to add a new DatanodeCommand
here.  The datanode change will be done in a separated JIRA.



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