[HDFS-6837] Code cleanup for Balancer and Dispatcher

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Component/s: balancer & mover
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 10/Aug/14 04:03
• Updated: 01/Dec/14 03:09
• Resolved: 11/Aug/14 18:04

Description

A few minor code cleanup changes:

• The constructor of Dispatcher should not read Balancer's conf properties; the values should be passed by parameters.
• StorageGroup.utilization can be removed; it is only used in toString().
• Move Balancer.ReturnStatus to a standalone class.
• In Dispatcher, rename BalancerDatanode to DDatanode.