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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,巨石强森在社媒体上公布NBC喜剧《Young Rock》的主要演员阵容，这部喜剧取材于他的生活，该剧将于2021年首播，由多名演员扮演他本人的不同阶段人生的角色！　　其后，单云发现伍德仍然和那个女人及其孩子来往，回家后又发现伍德对网名为“胡大仙”的女人无微不至的关怀，素有洁癖的单云走到绝望的边缘，甚至有自杀之念。在恍惚中，来到他们新婚时曾居住过的幸福小房子。4a7795e0ab3340dcab23a7f128bf72c4《火线下的江湖大佬》，香港电视广播有限公司拍摄制作的时装喜剧舞狮电视剧，是无线电视首部以舞狮为题材的电视剧，由郑则士、苑琼丹、黄光亮、陈炜及岑丽香领衔主演，监制梁材远。