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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4583) Code optimization/cleanup in HDFS
Date Tue, 04 Nov 2008 00:39:44 GMT
Code optimization/cleanup in HDFS
---------------------------------

                 Key: HADOOP-4583
                 URL: https://issues.apache.org/jira/browse/HADOOP-4583
             Project: Hadoop Core
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.20.0
            Reporter: Suresh Srinivas
            Assignee: Suresh Srinivas
             Fix For: 0.20.0


Some of the changes needed:
- FSNameSystem.allocateBlock creates a lot of object unnecessarily to find a blockID that
is unused. It should reuse the Block object created by changing the blockID and reusing the
GenerationStamp.
- InodeFile.addBlock should use System.arrayCopy instead of copying 1 at a time.
- Some of the for loops in FSEditLog.java can be optimized. Instead of getting the edit stream
length in termination condition, a local variable should be used to do the same.


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