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ABC宣布续订《实习医生格蕾》第16季、第17季。板栗见她不像前日那般低落萧索，神情甚是欢悦，心情也跟着好了起来。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,吕雉点头道：今日阵前的事情你我都是看在眼里的，霸王现在失望什么，烦恼什么似乎不言而喻。项羽冷笑道：看来他们还是惧怕我西楚，否则何必要急着溜走？范增道：越军溜了倒是不打紧，即便蒲俊和苏角真是从我西楚国内经过，也不好明目张胆对付。Summary沈飞打算去洛阳，但是他忘了古代的交通。