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From "Bharath Mundlapudi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1061) Memory footprint optimization for INodeFile object.
Date Mon, 22 Mar 2010 22:41:29 GMT
Memory footprint optimization for INodeFile object. 
----------------------------------------------------

                 Key: HDFS-1061
                 URL: https://issues.apache.org/jira/browse/HDFS-1061
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
    Affects Versions: 0.22.0
            Reporter: Bharath Mundlapudi
            Priority: Minor
             Fix For: 0.22.0


I am proposing a footprint optimization to merge blockReplication and preferredBlockSize fields
into one 'long header' field in INodeFile class. This saves 8 bytes per INodeFile object on
a 64 bit JVM. This memory optimization is transparent and changes are very minimal.


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