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50道Redis面试题史上最全，以后面试再也不怕问Redis了
source link: https://juejin.im/post/5cb13b4d6fb9a0687b7dd0bd
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1、什么是Redis？ Redis本质上是一个Key-Value类型的内存数据库，很像memcached，整个数据库统统加载在内存当中进行操作，定期通过异步操作把数据库数据flush到硬盘上进行保存。因为是纯内存操作，Redis的性能非常出色，每秒可以处理超过
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