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　　物欲横流的时代，人们该如何面对曾经弥足珍贵的亲情、友情与爱情……Sentinel (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,Of course, it is necessary to press and hold the forced movement to ensure the correct trigger of Yang Ku's injury.This subject object notifies all observer objects when its state changes so that they can update themselves automatically《栋仁的时光》是一部由TVB制作，袁伟豪、唐诗咏、黄长兴、朱晨丽等主演的香港电视剧。而随着极度虚弱的彼得突然消失，艾伦他们的调查开始朝着不可预测的方向发展……现在，对于整个启明集团来说，最重要的事情便是《倚天》的大电影——《倚天屠龙记之魔教教主》。