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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4908) Reduce snapshot inode memory usage
Date Thu, 11 Jul 2013 10:56:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13705695#comment-13705695
] 

Hudson commented on HDFS-4908:
------------------------------

Integrated in Hadoop-Yarn-trunk #267 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/267/])
    In CHANGES.txt, move HDFS-4908 and HDFS-4645 to 2.1.0-beta. (Revision 1502009)

     Result = SUCCESS
szetszwo : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1502009
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

                
> Reduce snapshot inode memory usage
> ----------------------------------
>
>                 Key: HDFS-4908
>                 URL: https://issues.apache.org/jira/browse/HDFS-4908
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode, snapshots
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 2.1.0-beta
>
>         Attachments: editsStored, h4908_20130617b.patch, h4908_20130617c.patch, h4908_20130617.patch,
h4908_20130619.patch, h4908_20130620.patch
>
>
> Snapshots currently use INodeFile and INodeDirectory for storing previous file/dir states
as snapshot inodes.  However, INodeFile and INodeDirectory have some fields not used by snapshot
inodes such as parent reference, inode id, block/children reference.  The memory footprint
could be reduced by having some specific classes for snapshot inodes.

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