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Update redis集群以及应用场景.md

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- [史上最全Redis高可用技术解决方案大全](https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=2247484850&idx=1&sn=3238360bfa8105cf758dcf7354af2814&chksm=cea24a79f9d5c36fb2399aafa91d7fb2699b5006d8d037fe8aaf2e5577ff20ae322868b04a87&token=1082669959&lang=zh_CN&scene=21#wechat_redirect)
- [Raft协议实战之Redis Sentinel的选举Leader源码解析](http://weizijun.cn/2015/04/30/Raft%E5%8D%8F%E8%AE%AE%E5%AE%9E%E6%88%98%E4%B9%8BRedis%20Sentinel%E7%9A%84%E9%80%89%E4%B8%BELeader%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/)
目录:
<!-- TOC -->
- [Redis 集群以及应用](#redis-集群以及应用)
@ -263,4 +265,4 @@ DECR key给 key 的 value 值减去一
1. 用户请求先访问本地缓存,无命中后再访问 Redis如果本地缓存和 Redis 都没有再查数据库,并把数据添加到本地缓存和 Redis
2. 由于设置了限流,一段时间范围内超出的请求走降级处理(返回默认值,或给出友情提示)。
[1]: https://promotion.aliyun.com/ntms/act/redishybridstorage.html?spm=5176.54432.1380373.5.41921cf20pcZrZ&aly_as=ArH4VaEb
[1]: https://promotion.aliyun.com/ntms/act/redishybridstorage.html?spm=5176.54432.1380373.5.41921cf20pcZrZ&aly_as=ArH4VaEb