架构 Varnish+nginx+php(FastCGI)+MYSQL5+MenCache+MenC实现php大负载

http://www.03964.com/read/34cf7f764e0b162b4c7b70ac.html

http://www.oschina.net/question/17_6406 varnish cache 配置使用

vcl是varnishd的存取策略，即varnishd的配置文件
#基本格式如下指定后台服务器机器端口
         backend www {
         set backend.host = "www.example.com";
         set backend.port = "http";
      }
#acl访问控制
         acl local {
         "locahost";       /* myself */
         "10.0.0.1"/8;    /* and everyone on the local network */
         ! "10.0.0.23";    /* except for the dialin router */
      }
#如果使用虚拟主机，请参照下面代码
         backend www {
         set backend.host = "www.example.com";
         set backend.port = "80";
      }

      backend images {
         set backend.host = "images.example.com";
         set backend.port = "80";
      }

      sub vcl_recv {
         if (req.http.host ~ "^(www.)?example.com$") {
               set req.backend = www;
         } elsif (req.http.host ~ "^images.example.com") {
               set req.backend = images;
         } else {
               error 404 "Unknown virtual host";
         }
      }