nodejs裏面redis設置過期時間

var redis = require('redis'),
    RDS_PORT = 6389,        //端口號
    RDS_HOST = '127.0.0.1',    //服務器IP
    RDS_PWD = '88888888888888',     //密碼 
    RDS_OPTS = {},            //設置項
    rclient = redis.createClient(RDS_PORT,RDS_HOST,RDS_OPTS);
rclient.auth(RDS_PWD,function(){  
    console.log('redis通過認證');  
}); 

//redis數據庫
rclient.set('key','1');//賦值
rclient.expire('key',60);//60秒自動過期