What are the implementation methods of server load balancing?
1. Method based on DNS polling: that is, set multiple DNS A records for the same domain name in the DNS server, and realize server load balancing through the DNS polling mechanism
2. Server cluster-based approach
zookeeper cluster management load balancing function
3. Based on the implementation method of application software, the cooperative work and task scheduling among multiple servers are considered in the application software design. In this method, a server is generally used as the hub to schedule access requests, and at the same time, it is required to support access redirection or task scheduling and jump mechanisms at the application layer.
4. It is implemented by special L4/L7 layer switches, which is what we often call load balancers. Generally, it is realized by performing address translation (NAT) on the L4/L7 layer switch.
5. Proxy-based load balancing algorithm