使用 Nginx 提升网站访问速度

http://www.ibm.com/developerworks/cn/web/wa-lo-nginx/

配置 Nginx
先来看一个实际的配置文件：
user  nobody;# 工作进程的属主
worker_processes  4;# 工作进程数，一般与 CPU 核数等同

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
    use epoll;#Linux 下性能最好的 event 模式
    worker_connections  2048;# 每个工作进程允许最大的同时连接数
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] $request '
    #                  '"$status" $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  off;
    access_log  logs/access.log;# 日志文件名

    sendfile        on;
    #tcp_nopush     on;
    tcp_nodelay     on;

    keepalive_timeout  65;

    include gzip.conf;
   
    # 集群中的所有后台服务器的配置信息
    upstream tomcats {
server 192.168.0.11:8080 weight=10;
server 192.168.0.11:8081 weight=10;
server 192.168.0.12:8080 weight=10;
server 192.168.0.12:8081 weight=10;
server 192.168.0.13:8080 weight=10;
server 192.168.0.13:8081 weight=10;
    }

    server {
        listen       80;#HTTP 的端口
        server_name  localhost;

        charset utf-8;

        #access_log  logs/host.access.log  main;

location ~ ^/NginxStatus/ {
    stub_status on; #Nginx 状态监控配置
    access_log off;
}

location ~ ^/(WEB-INF)/ {
    deny all;
}


location ~ \.(htm|html|asp|php|gif|jpg|jpeg|png|bmp|ico|rar|css|js|
zip|java|jar|txt|flv|swf|mid|doc|ppt|xls|pdf|txt|mp3|wma)$ {
             root /opt/webapp;
    expires 24h;
        }

        location / {
    proxy_pass http://tomcats;# 反向代理
    include proxy.conf;
        }

        error_page 404 /html/404.html;

        # redirect server error pages to the static page /50x.html
        #
error_page 502 503 /html/502.html;
        error_page 500 504 /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}