[HDFS-10956] Remove rename/delete performance penalty when not using snapshots

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha2
• Component/s: hdfs
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Daryn Sharp
• Reporter: Daryn Sharp
• Created: 04/Oct/16 16:31
• Updated: 04/Oct/16 20:30
• Resolved: 04/Oct/16 20:30

Description

When deleting or renaming directories, the entire subtree(s) is scanned for snapshottable directories. The performance penalty may become very expensive for dense trees. The snapshot manager knows if snapshots are in use, so clusters not using snapshots should not take the performance penalty.