nginx proxy_cache学习笔记

        文件配置
       proxy_temp_path /data/cache1/proxy_temp;
        proxy_cache_path /data/cache1/proxy_cache levels=1:2 keys_zone=tmp_cache:200m inactive=10000d max_size=2G;
     #设置Web缓存区名称为tmp_cache，内存缓存空间大小为200MB，1000天没有被访问的内容自动清除，硬盘缓存空间大小为2G。
        location / {
    proxy_redirect          off;
    proxy_set_header        Host            $host;
    proxy_set_header        X-Real-IP       $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_connect_timeout   180;
    proxy_send_timeout      180;
    proxy_read_timeout      180;
    proxy_buffer_size       128k;
    proxy_buffers           4 128k;
    proxy_busy_buffers_size 128k;
    proxy_temp_file_write_size 128k;
    proxy_cache tmp_cache;
    proxy_cache_valid 200 304 1m;
    proxy_cache_valid 404 1m;
    proxy_cache_key $uri$is_args$args; #使用域名、URI、参数组合Web缓存的Key值，Nginx根据Key值进行哈希计算，存储缓存内容到二级缓存目录内
    add_header  Nginx-Cache "$upstream_cache_status";
    proxy_pass
        }

wget 第一次访问反向代理服务器
[root@B ~]# wget -SO /dev/null -e http_proxy=127.0.0.1
--2014-06-29 21:36:02-- 
Connecting to 127.0.0.1:80... connected.
Proxy request sent, awaiting response...
  HTTP/1.1 200 OK
  Server: nginx/1.0.9
  Date: Sun, 29 Jun 2014 13:36:03 GMT
  Content-Type: text/html
  Connection: close
  Content-Length: 10
  Last-Modified: Sat, 29 Mar 2014 18:23:44 GMT
  Accept-Ranges: bytes
  Nginx-Cache: EXPIRED
Length: 10 [text/html]
Saving to: `/dev/null'

100%[===========================================================================================================================>] 10          --.-K/s   in 0s      

2014-06-29 21:36:03 (376 KB/s) - `/dev/null' saved [10/10]

[root@B ~]#
wget 第二次访问反向代理服务器
[root@B ~]# wget -SO /dev/null -e http_proxy=127.0.0.1
--2014-06-29 21:37:01-- 
Connecting to 127.0.0.1:80... connected.
Proxy request sent, awaiting response...
  HTTP/1.1 200 OK
  Server: nginx/1.0.9
  Date: Sun, 29 Jun 2014 13:37:01 GMT
  Content-Type: text/html
  Connection: close
  Content-Length: 10
  Last-Modified: Sat, 29 Mar 2014 18:23:44 GMT
  Nginx-Cache: HIT
  Accept-Ranges: bytes
Length: 10 [text/html]
Saving to: `/dev/null'

100%[===========================================================================================================================>] 10          --.-K/s   in 0s      

2014-06-29 21:37:01 (66.0 KB/s) - `/dev/null' saved [10/10]

access.log日志
127.0.0.1 - - [29/Jun/2014:21:36:03 +0800] "GET HTTP/1.0" 200 10 "-" "Wget/1.11.4 Red Hat modified" "-" "EXPIRED"
127.0.0.1 - - [29/Jun/2014:21:37:01 +0800] "GET HTTP/1.0" 200 10 "-" "Wget/1.11.4 Red Hat modified" "-" "HIT"