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Sentinel clusters communicate with each other, Communicates the status of the redis node, Make corresponding judgment and process, The subjective offline state and the objective offline state here are more important states, They determine whether to fail over, You can subscribe to the specified channel information, When the server fails, notify the administrator that the client can regard Sentinel as a Redis server that only provides subscription function. You cannot use the PUBLISH command to send information to this server, but you can use the SUBSCRIBE command or the PSUBSCRIBE command to obtain corresponding event reminders by subscribing to a given channel. A channel can receive events with the same name as this channel. For example, a channel named + sdown can receive events that all instances enter the subjective offline (SDOWN) state.　　清光绪二十年，张仰山已年迈体弱，次子张山林做了松竹斋现任的掌柜。可惜，张山林天生没有经营生意的心思，只顾沉溺玩乐，把家里的积蓄全浪费在花鸟鱼虫上面，还把这习气教传给了张李Why is this happening? "Because although they have money, they still act like poor people." I have a friend who started his own business, bought a villa and picked up his parents in the countryside. Since then, my friend has grown up.该动画讲述了落魄少年楚行云立志要改变现状奋发图强创造一片新天地的故事。说到这里，苏岸着急的已经快哭出来。无碍。