[HDFS-8830] Support add/remove directories to an existing encryption zone

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Later
• Component/s: namenode
• Assignee: Xiaoyu Yao
• Reporter: Xiaoyu Yao
• Created: 28/Jul/15 19:53
• Updated: 03/Apr/17 23:11
• Resolved: 03/Apr/17 23:11

Description

This is the first step toward better "Scratch space" and "Soft Delete" support. We remove the assumption that the hdfs directory and encryption zone is 1 to 1 mapped and can't be changed once created.

The encryption zone creation part is kept As-Is from Hadoop 2.4. We generalize the encryption zone and its directories from 1:1 to 1:many. This way, other directories such as scratch can be added to/removed from encryption zone as needed. Later on, files in these directories can be renamed within the same encryption zone efficiently.