[HADOOP-6223] New improved FileSystem interface for those implementing new files systems.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.21.0
• Component/s: fs
• Hadoop Flags: Reviewed
• Release Note: Add new file system interface AbstractFileSystem with implementation of some file systems that delegate to old FileSystem.
• Assignee: Sanjay Radia
• Reporter: Sanjay Radia
• Created: 31/Aug/09 00:33
• Updated: 02/May/13 02:29
• Resolved: 30/Oct/09 22:26

Description

The FileContext API (HADOOP-4952) provides an improved interface for the application writer.
This lets us simplify the FileSystem API since it will no longer need to deal with notions of default filesystem [ / ], wd, and config
defaults for blocksize, replication factor etc. Further it will not need the many overloaded methods for create() and open() since
the FileContext API provides that convenience.
The FileSystem API can be simplified and can now be restricted to those implementing new file systems.

This jira proposes that we create new file system API, and deprecate FileSystem API after a few releases.

Issue Links

• is depended upon by: HDFS-702 Add Hdfs Impl for the new file system interface
• is related to: HADOOP-4952 Improved files system interface for the application writer.
• is related to: HADOOP-6324 FileSystem API should allow progress callbacks in rename and delete
• relates to: HADOOP-6265 Remove deprecated protected methods added to FileSystem to support FileContext.
• relates to: HADOOP-4357 Rename all the FSXxx classes to FsXxx