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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.新调来的刑警普克智力超群，在一起案件的侦破中，他的能力很快得到了搭档彭大勇及周围同事的认可。大学女生方英无意间目击到一起杀人案的案发过程。普克根据她的叙述展开调查。To sum up:单纯善良的中二少年王逸川因为长相帅气，专业扎实。考上了东南艺术学院的表演系。从而遇见了以后要在一起生活四年的室友们。有同样长相帅气，却因为身高时常感到不自信的段仕杰。辍学两年，带有毒舌属性的戏美潮人陈东东，以及在教授父母的压力下从小优秀到大的16岁少年，戏文专业的顾书恒。他们一起经历了学业上的打击，情感上的困扰。在相爱相杀中，结成了兄弟。大一的上学期结束了，宿舍灯火落在时光旧巷里，照亮了他们的青春。热闹中，有位夫人按捺不住好奇心，问郑氏，为何不见大姑娘。What qualifications and requirements does a male kindergarten teacher need?