[HDFS-5470] Add back trunk's reportDiff algorithm to HDFS-2832

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Heterogeneous Storage (HDFS-2832)
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 06/Nov/13 22:26
• Updated: 17/Mar/14 20:50
• Resolved: 07/Nov/13 00:13

Description

As reminded by shv in HDFS-5464, the report diff algorithm uses less memory. It also has a faster running time. We should add it back to the branch.