[HDFS-6609] Use DirectorySnapshottableFeature to represent a snapshottable directory

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Jing Zhao
• Created: 30/Jun/14 18:27
• Updated: 01/Dec/14 03:09
• Resolved: 08/Jul/14 00:08

Description

Currently we use INodeDirectorySnapshottable to represent a snapshottable directory. When we set a directory to snapshottable, we also need to replace the corresponding INode. It will be better to use a DirectorySnapshottableFeature to simplify the process and get rid of the inode replacement.