Memcached 基础应用

安装

Memcached服务器端的安装 (此处将其作为系统服务安装)
  下载文件:memcached 1.2.1 for Win32 binaries (Dec 23, 2006) 
   1 解压缩文件到c:\memcached
   2 命令行输入 'c:\memcached\memcached.exe -d install' 
   3 命令行输入 'c:\memcached\memcached.exe -d start' ,该命令启动 Memcached ,默认监听端口为 11211
  通过 memcached.exe -h 可以查看其帮助

 image

系统中会添加下面的服务

image
二   .NET memcached client library
   下载文件:https://sourceforge.net/projects/memcacheddotnet/

   里面有.net1.1  和 .net2.0的两种版本  还有一个不错的例子。

版本更新很慢,在.Net 的开发技术中十分少用,首微软的开发解决方案上面不赞成此种共享内存方式。

 

代码

引用下面的组件

image

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using Memcached.ClientLibrary;
using System.Collections;

namespace MemcachedSample
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            int runs = 100;
            int start = 200;
            //if (args.Length > 1)
            //{
            //    runs = int.Parse(args[0]);
            //    start = int.Parse(args[1]);
            //}

            string[] serverlist = { "192.168.1.80:11211", "192.168.1.80:11211" }; //只能用IP

            // 初始缓存服务器
            SockIOPool pool = SockIOPool.GetInstance();
            pool.SetServers(serverlist);
            
            //连接数
            pool.InitConnections = 3;
            pool.MinConnections = 3;
            pool.MaxConnections = 5;
            
            //超时时间
            pool.SocketConnectTimeout = 1000;
            pool.SocketTimeout = 3000;
            //
            pool.MaintenanceSleep = 30;
            pool.Failover = true;

            pool.Nagle = false;
            pool.Initialize();

            // 获得客户端实例
            MemcachedClient mc = new MemcachedClient();
            // 启用压缩
            mc.EnableCompression = false;
            // 缓存Key
            string keyBase = "testKey";
            string obj = "放到缓存中的内容对象";

            long begin = DateTime.Now.Ticks;
            //循环runS - start 次 添加这么多次的块缓存,内容全是一个
            for (int i = start; i < start + runs; i++)
            {
                mc.Set(keyBase + i, obj); //存储数据到缓存服务器,Key 是 testKey100,testKey101......

            }
            long end = DateTime.Now.Ticks;
            long time = end - begin;//计算缓存用去的时间
            

            Response.Write(runs + " 次的存储时间: " + new TimeSpan(time).ToString() + "ms<br />");


            begin = DateTime.Now.Ticks;
            int hits = 0;
            int misses = 0;
            for (int i = start; i < start + runs; i++)
            {
                string str = (string)mc.Get(keyBase + i); //获取当前次数的缓存值
                if (str != null)
                    ++hits; //存在计数
                else
                    ++misses; //不存在计数,这种实力如果出现不存在就出问题了
            }
            end = DateTime.Now.Ticks;
            time = end - begin; //计算时间

            Response.Write(runs + " 获取缓存内容的时间: " + new TimeSpan(time).ToString() + "ms" + "<br />");
            Response.Write("Cache hits: " + hits.ToString() + "<br />");
            Response.Write("Cache misses: " + misses.ToString() + "<br />");

            IDictionary stats = mc.Stats();
            foreach (string key1 in stats.Keys)
            {
                Response.Write("配置地址做Key,也就是此地址当前的配置信息:"+key1 + "<br />而值也是一个名值对每个名是状态名,值是状态值:<br />");
                Hashtable values = (Hashtable)stats[key1]; //地址的状态集合
                foreach (string key2 in values.Keys) //遍历输出
                {
                    Response.Write(key2 + ":" + values[key2] + "<br />");
                }
                Response.Write("<p />");
            }

         //   if (mc.KeyExists("test"))
         //    {
         //       Console.WriteLine("test is Exists");
         //      Console.WriteLine(mc.Get("test").ToString());
         //    }


            SockIOPool.GetInstance().Shutdown();  ////关闭池, 关闭sockets

        }
    }
}

结果

image

代码下载:MemcachedSample.rar

posted on 2009-10-29 15:48 冯瑞涛 阅读( ...) 评论( ...) 编辑 收藏