php开发服务器之 memcache缓存数据
Memcache,Redis
1.都是用来管理数据的
2.他们数据都是存放在内存
3.Redis可以定期将数据备份到磁盘(持久化)
4.Memcache只是简单的key/value缓存
5.Redis不仅仅支持简单的key/value类型数据,
同时还提供list,set,hash等数据结构的存储
Mysql如果操作数据:
1.需要mysql服务器
2.需要操作mysql数据库的终端(如navicat)
3.需要mysql服务器地址,端口号(默认3306)
4.连接到地址,写sql命令。
5.服务器接受到命令,对数据库操作,并将数据返回。
页面和客户端app不能操作终端的,所以需要服务器脚本
redis memcache操作数据方式和mysql操作数据库方式类似
1.客户端通过地址和端口号连接到redis memcache服务器
2.客户端发送set(设置)/get(获取)命令给服务器
3.服务器接受后通过php处理,将数据返回给数据库
php在新浪sae中生成memcache数据
<?php $mmc=memcache_init();if($mmc==false) echo "mc init failed\n";else{ //0是flag,10是有效时间 memcache_set($mmc,"key","david",0,10); }

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