JAVA架构面试_Redis高频面试题-1.pdf资源-CSDN文库

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Redis 高频面试题及答案

1.redis 是什么？ ...................................................................................................................................................1

2.redis 怎么使用？ ..............................................................................................................................................2

3.应用场景: ............................................................................................................................................................2

String : ............................................................................................................................................................2

list(双向链表) ...............................................................................................................................................2

hash(hashmap) ............................................................................................................................................3

4.为什么 redis 是单线程的都那么快？ ........................................................................................................3

5.redis 也可以进行发布订阅消息吗？ .........................................................................................................3

6.redis 能否将数据持久化，如何实现？.....................................................................................................4

RDB 持久化原理： .....................................................................................................................................4

AOF 持久化原理： ....................................................................................................................................4

7.主从复制模式下，主挂了怎么办？...........................................................................................................4

8.哨兵模式实现原理？（2.8 版本或更高才有） ......................................................................................5

1.三个定时监控任务： .............................................................................................................................5

2.主客观下线： ...........................................................................................................................................5

3.选举出某一哨兵节点作为领导者 ......................................................................................................5

4.故障转移 ....................................................................................................................................................5

9.redis 集群（采用虚拟槽方式，高可用）原理（和哨兵模式原理类似，3.0 版本或以上才有）？

...................................................................................................................................................................................6

10.缓存更新策略（即如何让缓存和 mysql 保持一致性）？ ...............................................................6

10.1 key 过期清除（超时剔除）策略 .................................................................................................6

10.2 Redis 的内存淘汰策略 ....................................................................................................................7

11.缓存粒度控制？ ................................................................................................................................

.............8

12.如何防止缓存穿透？ ....................................................................................................................................8

13.无底洞优化？ ..................................................................................................................................................9

14.雪崩优化 ...........................................................................................................................................................9

15.热点 key 优化 ..................................................................................................................................................9

1.redis 是什么？