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Flow Control

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.