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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2656) Support for upgrading existing cluster to facilitate appends to HDFS files
Date Fri, 18 Jan 2008 17:57:34 GMT
Support for upgrading existing cluster to facilitate appends to HDFS files
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                 Key: HADOOP-2656
                 URL: https://issues.apache.org/jira/browse/HADOOP-2656
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
            Reporter: dhruba borthakur


HADOOP-1700 describes the design for supporting appends to HDFS files. This design requires
a distributed-upgrade to existing cluster installations. The design specifies that the DataNode
persist the 8-byte BlockGenerationStamp in the block metadata file. The upgrade code will
introduce this new field in the block metadata file and initialize this value to 0.

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