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Posted to hdfs-issues@hadoop.apache.org by "Bharath Mundlapudi (JIRA)" <ji...@apache.org> on 2010/06/02 23:49:57 UTC

[jira] Updated: (HDFS-1061) Memory footprint optimization for INodeFile object.

     [ https://issues.apache.org/jira/browse/HDFS-1061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bharath Mundlapudi updated HDFS-1061:
-------------------------------------

    Attachment: HDFS-1061-rel20.patch

Attached the patch for release 0.20

> 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
>            Assignee: Bharath Mundlapudi
>            Priority: Minor
>             Fix For: 0.22.0
>
>         Attachments: HDFS-1061-1.patch, HDFS-1061-2.patch, HDFS-1061-3.patch, HDFS-1061-rel20.patch, HDFS-1061.patch
>
>
> 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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