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　日落2021Sentinel (Sentinel) process is used to monitor the working status of Master master server in redis cluster. When Master master server fails, it can switch between Master and Slave servers to ensure high availability of the system. It has been integrated into redis2.6 + version, and Redis Sentinel mode has stabilized after version 2.8. In general, it is also recommended to use later versions of Redis version 2.8 in production environment. Sentinel is a distributed system. You can run multiple sentinel processes in one architecture. These processes use gossip protocols to receive information about whether the Master master server is offline, and use Agreement Protocols to decide whether to perform automatic failover and which Slave to select as the new Master. Each Sentinel process will send messages to other Sentinel, Master and Slave regularly to confirm whether the other party is "alive". If it is found that the other party has not received a response within the specified configuration time (configurable), it will temporarily think that the other party has dropped, which is called "Subjective Down". English name: Subjective Down, SDOWN for short. Subjective Down,林中校于美国联邦监狱抽选一批华裔刑事重犯，以美国居留权及每人二十万美元作酬劳，组成杂牌军，执行“东方秃鹰”行动，其目的是炸毁越共的武器库。一行人乘飞机空降北越，强渡关山，他们能够完成预定的任务吗？Therefore, if there are mistakes, please correct them, if there are problems, please communicate. 剧集《卢克·凯奇》中，这位天赋异禀的角色在纽约市黑人聚集地哈莱姆区重拾生活的过程中，被迫与他所在城市的核心人物，也就是马赫莎拉哈什巴兹·阿里饰演的Cornell Stokes展开斗争，而这一切都迫使他再度面对他想埋葬的过去。 　　卢克·凯奇这个角色首次出现在《杰西卡·琼斯》之中，他是杰西卡·琼斯的爱人。在剧集中，卢克受重伤在被杰西卡送到医院时，遇到罗莎里奥·道森饰演的Claire Temple，Claire负责照顾卢克直到他清醒。而在《卢克·凯奇》中，观众将继续看到罗莎里奥·道森的身影，而饰演杰西卡·琼斯的克里斯滕·里特将不会参演。Chapter I General Provisions