Flow Control Policy

Scenario

You can limit the frequency of request send to specific microservice when flow control was enables in consumer service.

Precaution

See detail info at Service Configurations。

Configuration

Flow control policy configuration is in microservice.yaml file. You need to configure consumer handler in chain of service. See example blow:

servicecomb:
  handler:
    chain:
      Consumer:
        default: qps-flowcontrol-consumer

Configuration items of QPS:

Configuration Item	Default Value	Value Range	Mandatory	Description	Remark
servicecomb.flowcontrol.Consumer.qps.enabled	true	Boolean	No	Specifies whether consumers flowcontrol enables.	-
servicecomb.flowcontrol.Consumer.qps.limit.[ServiceName].[Schema].[operation]	2147483647 (max int)	(0,2147483647], Integer	No	Specifies number of requests per second.	Support three level configurations: microservice、schema、operation.