[HDFS-9566] Remove expensive 'BlocksMap#getStorages(Block b, final DatanodeStorage.State state)' method

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.0, 3.0.0-alpha1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: namenode
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Daryn Sharp
• Reporter: Daryn Sharp
• Created: 16/Dec/15 21:25
• Updated: 30/Aug/16 01:21
• Resolved: 01/Feb/16 08:11

Description

HDFS-5318 added a BlocksMap#getStorages(Block, State) which is based on iterables and predicates. The method is very expensive compared to a simple comparison/continue.