2)srcache_nginx redis 构建缓存系统应用一例

srcache_nginx模块相关参数介绍，可以参见《memc_nginx+srcache_nginx+memcached构建透明的动态页面缓存》。 redis是一种高效的key-value存储。

下面举一例应用，看配置：

upstream redis {
	server 127.0.0.1:6380;
	keepalive 512;
}

server {
	listen       80 backlog=1024 default;
	server_name  www.ttlsa.com;
	index index.html index.htm index.php;
	root  /data/wwwroot/www.ttlsa.com/webroot;

	location / {
		set $flag 0;
		if ($uri ~ /thumb/[0-9]+_160.jpg$){
				set $flag "${flag}1";
		}
		if ($arg_unitid = 42012){
				set $flag "${flag}1";
		}
		if (!-e $request_filename) {
				rewrite ^/(.*)$ /index.php?kohana_uri=$1 last;
		}
	}
	location ~ .*\.php?$ {
		srcache_store_private on;
		srcache_methods GET;
		srcache_response_cache_control off;
		if ($flag = "011"){
			set $key $request_uri;
			set_escape_uri $escaped_key $key;
			srcache_fetch GET /redis $key;
			srcache_default_expire 172800;
			srcache_store PUT /redis2 key=$escaped_key&exptime=$srcache_expire;

			add_header X-flag $flag;
			add_header X-Cached-From $srcache_fetch_status;
			add_header X-Cached-Store $srcache_store_status;
			add_header X-Key $key;
			set_md5 $md5key $key;
			add_header X-md5-key $md5key;
			add_header X-Query_String $query_string;
			add_header X-expire $srcache_expire;
		}	
		include fastcgi_params;
		fastcgi_pass  127.0.0.1:10080;
		fastcgi_index index.php;
		fastcgi_connect_timeout 300;
		fastcgi_send_timeout 300;
		fastcgi_read_timeout 300;
		fastcgi_buffer_size 128k;
		fastcgi_buffers 4 256k;
		fastcgi_busy_buffers_size 256k;
		fastcgi_temp_file_write_size 256k;
		fastcgi_intercept_errors on;
		fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
	}

	location = /redis {
		internal;
		set_md5 $redis_key $args;
		redis_pass redis;
	}

	location = /redis2 {
		internal;

		set_unescape_uri $exptime $arg_exptime;
		set_unescape_uri $key $arg_key;
		set_md5 $key;

		redis2_query set $key $echo_request_body;
		redis2_query expire $key $exptime;
		redis2_pass redis;
	}
}

测试：

redis实例下：

可以记录下日志来测试加缓存前后的耗时。日志格式如下：

log_format srcache_log '$remote_addr - $remote_user [$time_local] "$request" '
                                '"$status" $body_bytes_sent $request_time $bytes_sent $request_length '
                                '[$upstream_response_time] [$srcache_fetch_status] [$srcache_store_status] [$srcache_expire]';

转载请注明来自运维生存时间: http://www.ttlsa.com/html/3952.html

来自 http://www.ttlsa.com/nginx/to-build-an-application-cache-system-of-srcache_nginx-redis/