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