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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-4908) Reduce snapshot inode memory usage
Date Wed, 10 Jul 2013 21:15:48 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tsz Wo (Nicholas), SZE resolved HDFS-4908.

       Resolution: Fixed
    Fix Version/s:     (was: 2.2.0)

Merged this to 2.1.0-beta.
> 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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