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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.三人无声交流，外人再看不出。嬴政和勾陈的一战，成了压垮人间界的最后一根稻草，人间界灵气尽失，再难成仙得道。墨西哥裔女孩克劳丽娅自幼和母亲在美国一起生活。由于过度宠爱，不知天高地厚，年纪轻轻就犯下大罪，被羁押回故乡墨西哥。剧情就此展开.....《太平洋大逃杀》源于一起发生在2010年的真实事件。2010年12月，“鲁荣渔2682号”渔船载33名船员出海，前往秘鲁、智利海域钓鱿，其间渔船失去踪迹。出海8个月后，被中国渔政船拖带回港时，船上只剩11名船员。历时近两年的侦办和审理，11名生存船员被判杀害22名同伴。When you have determined a reliable cross-validation method, you have already succeeded by more than half. If I cannot find a suitable model evaluation method, I will not proceed to the next step.我们离牛背山，不是还有几天的路程吗？我们几天之后，才算归隐，现在还在江湖，遇到不平事，当然要管