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Secondly, because of the abstraction of how objects collaborate, the mediation is taken as an independent concept and encapsulated in an object, so the focus on objects shifts from their own behaviors to their interactions.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,…,于是乎楚军和汉军之间的第二次生死搏杀再次上演，不过这次攻守易位罢了。如果能够只效忠一个国家、一面国旗，而不会遭受任何怀疑，是多么幸福的事……「你的祖国是……」天羽贤治以前从来没细想过这个问题。以血源来说，他是日本人；以国籍来说，他是美国人。第二代的日裔美国人应该都拥有两个祖国。战争，却让这个单纯的想法变成不堪的困境。担任记者的贤治因为曾经写过一篇敏感的报导，而被美国政府关进战俘营，后来又与全家人及所有日侨一起被隔离在沙漠的强制收容所。难道这就是正义和人道吗？只因为他们不是白皮肤、蓝眼睛，就要承受如此的屈辱与歧视？贤治的小弟勇想以鲜血来证明自己的忠诚，于是志愿加入美军，也让家人得以离开收容所，但父亲却愤而与勇断绝关系！贤治原本义无反顾地要贯彻「大和魂」，然而面对妻子和刚出生的儿子，百般纠结的情绪让他备感煎熬……人鱼公主戴汐和父亲打赌，一定要找到他口中根本不存在的爱情。从海洋出走遇见冲浪高手丁洋，被他“救”回岸上，糊里糊涂进入丁洋所在海洋学院，她隐瞒了人鱼身份，对丁洋一见钟情。丁洋为避免桃花总拿死党凌川作挡箭牌并传出绯闻，戴汐的出现，使一向对绯闻充耳不闻的凌川开始澄清自己，并对她穷追猛打，一时间“好基友”变成情敌。校花级人物杨雪暗恋小自己四岁的丁洋，本有希望的丁杨姐弟恋也因戴汐眼看成为泡影，杨雪开始主动出击，使计让冲浪中的戴汐沉入海洋，赶来救她的凌川发现了人鱼之尾得知戴汐身份并为其保密。戴汐面对从未体验过的人类生活和情感进行一个个闯关，倍感幸福的她却被父亲找到并逼迫回家，她极力反抗导致失忆，身份也暴露给丁洋等人，大家开始共同努力帮她找回记忆，重回家园，演绎了一段奇幻的人鱼之恋.....我常见你弄，也是会的。