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Flow Control

  • Flow control avoids microservice overload operations by controlling the data transfer rate. This guide will show you how to use the flow control capabilities provided by mesher

Before you start

Enable

  • Change the configuration file chassis.yaml of mesher_calculator. Add a flow control configuration in chassis.yaml as follows. Restart the service.

    flowcontrol:
 Provider:
   qps:
     enabled: true                 # enable rate limiting or not
     global:
       limit: 0                    # default limit of provider
     limit:
       Server: 0                  # rate limit for request from a provider

    The frequency limit configuration make the request accepted per second is 0 which means no service is provided.

Verification

  • Click the Submit button and you can see that the request was rejected due to the flow control of mesher. Now the request can not reach real httpserver.

flow-control-req

flow-control-log

What’s next