随着网站访问量的增加,一些网站往往有多个地理上分布的提供相同服务内容的服务器群组,因此需要进行负载均衡处理。文章概括分析了现有的几种负载均衡算法,并提出了两种基于DNS的负载均衡新方法。该方法通过域名解析,根据每个服务器的可用性、客户与服务器之间的距离,以及地理范围匹配值,按照从优到劣的顺序返回网站的多个服务器的IP地址。 As website traffic increases, some websites tend to have multiple geographically distributed server groups that provide the same service content and therefore need to be load-balanced. The article summarizes several existing load balancing algorithms and presents two new methods of load balancing based on DNS. This method resolves the IP addresses of multiple servers on the web site in descending order by name resolution, based on availability of each server, client-server distance, and geographic range match.