Redis设置过期时间_redis过期时间原理

var redis = require('redis'),
    RDS_PORT = 6389,        //端口号
    RDS_HOST = '127.0.0.1',    //服务器IP
    RDS_PWD = '88888888888888',     //密码 
    RDS_OPTS = {},            //设置项
    rclient = redis.createClient(RDS_PORT,RDS_HOST,RDS_OPTS);
rclient.auth(RDS_PWD,function(){  
    console.log('redis通过认证');  
}); 

//redis数据库
rclient.set('key','1');//赋值
rclient.expire('key',60);//60秒自动过期