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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5284) Flatten INode hierarchy
Date Fri, 14 Feb 2014 08:26:29 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-5284:
----------------------------

     Target Version/s: 2.4.0
    Affects Version/s: 2.4.0

> Flatten INode hierarchy
> -----------------------
>
>                 Key: HDFS-5284
>                 URL: https://issues.apache.org/jira/browse/HDFS-5284
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 2.4.0
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>
> Currently, we have a complicated inode hierarchy for representing different states of
a file or a directory.  For example,  when a file is being created, it is represented by an
INodeFileUnderConstruction.  When a file is being closed, the inode is replaced by an INodeFile.
 If it is reopened for append, the inode is replaced again by an INodeFileUnderConstruction.
 This JIRA is to flatten the inode hierarchy.  We may also improve the performance by eliminating
the inode replacement in runtime.



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