[HDFS-12008] Improve the available-space block placement policy

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.8.1
• Component/s: block placement
• Target Version/s: 2.8.3
• Assignee: Kihwal Lee
• Reporter: Kihwal Lee
• Created: 21/Jun/17 21:33
• Updated: 11/Sep/17 08:03

Description

AvailableSpaceBlockPlacementPolicy currently picks two nodes unconditionally, then picks one node. It could avoid picking the second node when not necessary.