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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.From Asteraceae of Compositae. This is also a very useful subject! Please remember it! Famous plants of this family include:Basketball Match:21. The performance appraisal is not clear. A clear reward or punishment system should be established. The performance appraisal has been implemented since May, but the performance salary has not been implemented, causing speculation and dissatisfaction among employees.Toni分饰两角——炫酷哥哥和骚气弟弟；Ploy饰演毒舌美女。弟弟某天因为车祸导致不能正常工作，就求哥哥假扮他去上班，结果……哥哥爱上美女，美女以为爱上弟弟的故事就开始了。秦枫微微一笑。安在洪将出演电视购物公司的代理金周万（音译），在过去的六年里，在女友的精心帮助下成为了一名优秀的公司职员，“就业的话，站稳脚跟的话，找到出租房的话”以各种陈旧的理由一天天地推迟结婚，在公司有新职员艺珍（音译）的追求，她是国内首屈一指的财阀家族的女儿。