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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.你们在岷州抢掠和烧毁的军粮，都要如数赔偿。故事是发生在乱世之中，贫困的书生陈观，放弃科举成了志怪小说家。偶遇沉默寡言的少年剑客崔执玉，两人结伴前往蛇祸又起的长兴县，历经艰难险阻，最终合力破除邪崇，救下了同伴和百姓。3. Basic Handling of Activity Exception　　60年代初，豫西山区的岭前村和岭后村有一条小河之隔，清水长流。岭前村的葛长生和岭后村的赵建国是同学好友，在参军之前，同一天双双结婚，又同一天在岭间河边别离了新婚妻子应征入伍。从此，葛长生的妻子周翠和赵建国的妻子叶秀也成了至亲姐妹。然而，参军到部队的葛长生与赵建国很快到了抗美援越的前线，在一次战斗中，聪明的建国为救长生负伤，流血不止，在生命的最后他把妻子叶秀托付给了年长于他葛长生，然后，敌人冲上来了，一切也就结束了。Invoker.action ();张杨看看她摇头道：不用。