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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5284) Flatten INode hierarchy
Date Fri, 06 Jan 2017 22:04:59 GMT

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

Junping Du updated HDFS-5284:
    Target Version/s:   (was: 2.8.0)

> 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: Jing Zhao
> 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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