[ROCKETMQ-151] Support one slave map to two master

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Fix Version/s: 4.2.0
• Component/s: rocketmq-broker
• Assignee: Von Gosling
• Reporter: Eason Chen
• Created: 20/Mar/17 11:15
• Updated: 13/Dec/17 11:31
• Resolved: 13/Dec/17 11:31

Description

since slave can not be used 100% ,but we do need it to backup message, it is big waste to have so many slaves, so if it can let one slave map to two or more master