[HBASE-20740] StochasticLoadBalancer should consider CoprocessorService request factor when computing cost

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1
• Component/s: Balancer
• Labels: balancer
• Hadoop Flags: Reviewed

Release Note

Introduce CPRequestCostFunction for StochasticLoadBalancer, which will consider CoprocessorService request count when computing region load cost.
the multiplier can be set by hbase.master.balancer.stochastic.cpRequestCost, default value is 5.

• Assignee: chenxu
• Reporter: chenxu
• Created: 15/Jun/18 10:02
• Updated: 22/Apr/19 21:13
• Resolved: 22/Jun/18 07:32

Description

When compute region load cost, ReadRequest, WriteRequest, MemStoreSize and StoreFileSize are considered, But CoprocessorService requests are ignored. In our KYLIN cluster, there only have CoprocessorService requests, and the cluster sometimes unbalanced.