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systemDesign.excalidraw
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1918 lines (1918 loc) · 320 KB
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"text": "写在前面：现代社会几乎每一个人都使用聊天应用程序，为什么还要编写“聊天室项目”？\n \n答案有很多，主要有以下几点的考虑：\n \n 1. 从数据安全角度出发，公共聊天服务器的数据所有权属于平台方。企业/组织是\n 是无法掌握数据存储、流转和销毁的全流程。\n\n 2. 从公司业务的角度出发，公共聊天服务器或者应用软件无法实现深度定制，无法与\n 企业的业务系统深度耦合。\n\n 3. 从性能和稳定性的角度出发，公共的IM服务器是共享的，高并发环境下可能会出现\n 故障，而自建的服务可能会更加稳定，并且可以做定制化的保障。\n\n 4. 主要是为了提升系统设计和技术能力。",
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"originalText": "写在前面：现代社会几乎每一个人都使用聊天应用程序，为什么还要编写“聊天室项目”？\n \n答案有很多，主要有以下几点的考虑：\n \n 1. 从数据安全角度出发，公共聊天服务器的数据所有权属于平台方。企业/组织是\n 是无法掌握数据存储、流转和销毁的全流程。\n\n 2. 从公司业务的角度出发，公共聊天服务器或者应用软件无法实现深度定制，无法与\n 企业的业务系统深度耦合。\n\n 3. 从性能和稳定性的角度出发，公共的IM服务器是共享的，高并发环境下可能会出现\n 故障，而自建的服务可能会更加稳定，并且可以做定制化的保障。\n\n 4. 主要是为了提升系统设计和技术能力。",
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"text": "需求分析 ：\n \n 与其说需要构建的是“聊天室项目”，不如说是构建“聊天室组件”，我们考虑构建一个\n 模块化、可定制的聊天室组件系统，用户可以像 “搭积木” 一样选择所需功能组件，\n 编译后直接运行。我们从最简单的需求出发：\n\n 1. 功能性需求：\n - 单聊，1 v 1的聊天。\n - 群聊，多人的聊天室，人数不宜过多。\n\n 2. 非功能性需求：\n - 用户量，1B，（很冗余的设计，从业务出发的聊天应用基本不会达到这个并发量）\n - 延迟，0.5s，\n \n 接下来，我们从一个单体式应用出发。",
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