对Redis一些常用的命令进行测试
上一篇文章是对redis现有的数据结构进行了测试，实验，今儿就对redis的一些常用的命令进行测试：需要查看当前库的数据量，有三种
上一篇文章是对redis现有的数据结构进行了测试，实验，(见 )。今儿就对redis的一些常用的命令进行测试：
需要查看当前库的数据量，有三种方法：keys *，dbsize，info(这里是有很多的数据参数，，也是最近常使用的)
查看某个key值时，exists删除某个key值时del key值的重命名问题rename/renamenx 设置过期时间和持久化expire/persist还有个命令就是查看当前的情况，ttl意思是time to live 还有redis默认是有16个库存，我们如何进行选择和使用呢：select move
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