Tsz Wo (Nicholas), SZE created HDFS-5284:
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Summary: Flatten INode hierarchy
Key: HDFS-5284
URL: https://issues.apache.org/jira/browse/HDFS-5284
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
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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