Load Balancing

Load balancing functions on the client and is an indispensable key component of a high-concurrency and high-availability system. It aims to evenly distribute network traffic to multiple servers to improve the overall response speed and availability of the system.

• Load balancing of Java chassis is used for microservice consumers. The load balancing module must be integrated into microservice applications and the loadbalance processing chain must be enabled.
  Configuration example:

  servicecomb:
    handler:
      chain:
        Consumer:
          default: loadbalance
    loadbalance:   
      strategy:     
        name: RoundRobin #The polling mode is enabled.

  Add the following dependency to the POM file:

   <dependency>
     <groupId>org.apache.servicecomb</groupId>
     <artifactId>handler-loadbalance</artifactId>
     <version>${project.version}</version>
  </dependency>

• Spring Cloud Huawei load balancing is based on Ribbon in Spring Cloud and works on the client. The principles are as follows: When a random rule is used, the client randomly accesses an instance in the downstream microservice instance. When a polling rule is used, the client cyclically selects a server in the downstream microservice instance in sequence.

  Configuration example:

  servicecomb:
    loadbalance:
      userLoginAction: | 
        rule: Random #The random mode is enabled. The default mode is polling.