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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,There are three classic splitting strategies:筱原绘里香（伊藤加奈惠 配音）表面看来清纯可爱，实际上却是个为了满足爆棚的虚荣心而不惜撒谎的“狼少女”。为了令好友相信自己有一个并不存在的超英俊级男友，绘里香竟然跑到大街上进行“盗摄”，而她所拍下照片中的男子佐田恭也（樱井孝宏 配音），其真实身份居然是绘里香的校友，事已至此，绘里香的好运气似乎所剩不多。下船后，为了掩护被清廷通缉的佟光夫逃脱，刘恭正自己被上海道台抓捕，并押到他父亲开的大新舞台上要当场斩首示众。千钧一发之际，一个白发老人和一个红颜少女出面救了他。老人是携带重金赴外办差的清廷大太监，少女是刚刚被他从书寓中赎出的“女校书”韩如冰。由此开始了刘恭正和韩如冰两人之间既爱又恨、既疏又亲、充满了相惜与相斥、误解与理解、分道扬飙与重修旧好的几十年恩怨情缘。刘恭正是一个头脑灵活，胸襟开阔的商人。一心想把事业做大，以娱乐业为主，以其他产业为辅，在旧上海创造了一个“大世界”的奇迹。但最终还是敌不过命运，在一场繁花梦飘逝之后，妻离子散，家破人亡，只落得两手空空，面对一个爱和恨交织了一辈子的情人。但现在看来，尹旭是早有准备，未必肯动手，只怕是难以如愿。Here are a few columns to illustrate the benefits of the responsibility chain:陈步森幼年经历坎坷，父母离婚后走入社会，渐渐误入歧途被牵扯进一个杀人案中，他与同伙大马镫等人在抢劫杀害李寂后踏上逃亡之路……