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In the last article, we explained Redis' master-slave cluster mode in detail. In fact, the configuration of this cluster mode is very simple. It only needs to be configured on Slave's nodes. The configuration of Master's master node does not need to be changed. However, one thing is that the persistent configuration of Master and Slave nodes should be consistent as far as possible, otherwise there will be strange problems. Starting today, we will begin to talk about the second mode of Redis cluster mode. That is, the "Sentinel" mode, which was provided from version 2.6 of Redis, but the mode of this version was unstable at that time. The Sentinel mode did not stabilize until version 2.8 of Redis. In the production environment, if you want to use the Sentinel mode of Redis, you will try to use the version after version 2.8 of Redis. Whether it is master-slave mode or sentinel mode, both modes have a problem and cannot be expanded horizontally, and the high availability of these two modes will be limited by the memory of Master master node. Another point is that the configuration of Sentinel mode is not simple or even complicated, so neither mode is recommended in industrial scenes. If you want to use it, you must have solutions to related problems to avoid subsequent problems.The picture shows Mr. Sun taking a photo with the team members and the head of the trainee unit.(未完待续……) show_style();。危险逼进，路见不平的侠医傅青主（刘家良饰）为了解武庄之危，带了两位武庄青年武元英（杨采妮饰）和韩志邦（陆毅饰）上天山求助。擅于铸剑的世外高人晦明大师住在万里冰封的天山上，他珍藏七把剑中珍品。座下有大弟子楚昭南（甄子丹饰），二弟子杨云聪（黎明饰），三弟子辛龙子（戴立吾饰）以及四弟子穆郎（周群达饰），晦明大师认为武元英和韩志邦也是可塑之材，加上傅青主本人，把毕生修为炼成的七把宝剑分赠七人，是为“七剑下天山”的武林传奇。For children who have just played basketball, I don't think they need to buy too good a ball. About 100-150 balls are enough, and the quality is very good, and about 90 balls can also be used. What matters is not the ball, but the love of basketball. For the ball, as long as it is not too bad rubber ball, it is OK.The European Pharmacopoeia defines it as "liquid, semi-solid or solid preparations usually produced from plant or animal materials". If the extract is liquid, it can be called "Tinktur" tincture; If the extract becomes viscous after evaporation of the extract and the residual wettability (Restfeutigkeit) does not exceed 4%, then we can call it Spissum-Extrakt. Well, I really won't turn this over.　　在这一对笑料百出的男女周围，活跃着众多个性鲜明的人物，他们间发生了许多妙趣横生