[HDFS-4092] Update file deletion logic to support snapshot files

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Snapshot (HDFS-2802)
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 19/Oct/12 22:18
• Updated: 25/Oct/12 19:33
• Resolved: 25/Oct/12 19:33

Description

When snapshots are created, the blocks are shared among the snapshot files and the original file. Deletion of the snapshot file or the original file does not necessarily lead to deletion of the blocks. The deletion logic needs to be updated.