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《老来难》，语言通俗，描述细腻，道尽老年人的生活特点和万般苦痛，劝人要孝敬老人，尊重老人，并委婉告诉人们，人人都要经过老年这一阶段，孝敬老人也是尊重自己。过去，有人用这首《老来难》写出一个老人拄杖的画像，形象逼真，农村人贴在屋里，用来提醒人们的孝敬心，久传不衰。1. First handshake: Establish connection. The client sends a connection request message segment, setting the SYN position as 1 and the Sequence Number as x; Then, the client enters the SYN_SEND state and waits for confirmation from the server.神秘的外太空，出现了全新外星大反派！智羊羊与丽羊羊再次出现，喜羊羊妹妹首度亮相？全新的角色、发明、剧情，羊羊们这次该如何化解危机？3 ", Automatic failure: When a Master cannot work properly, the sentinel will start an automatic failure migration operation, which will upgrade one Slave of the failed Master to a new Master and change the other Slave of the failed Master to copy the new Master; When the client attempts to connect to the failed Master, the cluster will also return the address of the new Master to the client, allowing the cluster to replace the failed Master with the current Master. After switching between Master and Slave servers, the contents of the configuration files of Master's redis.conf, Slave's redis.conf and sentinel.conf will change accordingly, that is, the redis.conf configuration file of Master's master server will have more than one line of slaveof configuration, and the monitoring target of sentinel.conf will be changed accordingly.? Starting from this section, we introduce in detail the concepts and application scenarios of 23 design patterns in Java, and analyze them in combination with their characteristics and the principles of design patterns.《出生的秘密》是一部讲述准备结束生命的一对男女相遇，重新开始生活的作品。讲述了因患分离性记忆障碍，丢失了关于心爱男子和孩子记忆，进退两难的女子，与天才女儿的无知。他早就想上去瞧瞧了，那上边的人都在说笑吃果子哩，不知多快活。