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https://issues.apache.org/jira/browse/HADOOP-4583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suresh Srinivas updated HADOOP-4583:
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Attachment: 4583.patch
> 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
>
> Attachments: 4583.patch
>
>
> 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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