[HBASE-15281] Allow the FileSystem inside HFileSystem to be wrapped

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0, 2.0.0
• Fix Version/s: 1.3.0, 2.0.0
• Component/s: Filesystem Integration
• Release Note: This patch adds new configuration property - hbase.fs.wrapper. If provided, it should be fully qualified class name of the class used as a pluggable wrapper for HFileSystem. This may be useful for specific debugging/tracing needs.
• Assignee: Rajesh Nishtala
• Reporter: Rajesh Nishtala
• Created: 17/Feb/16 17:48
• Updated: 18/Jun/18 15:08
• Resolved: 02/May/16 22:01

Description

It would be very useful for us to be able to wrap the filesystems encapsulated by HFileSystem with other FilterFileSystems. This allows for more detailed logging of the operations to the DFS. Internally, the data logged from this method has allowed us to show application engineers where there schemas are inefficient and inducing too much IO. This patch will just allow the filesystem to be pluggable.