反应式宣言 - renfufei的专栏 - 博客频道 - CSDN.NET
Organisations working in disparate domains are independently discovering patterns for building software that look the same. These systems are more robust, more resilient, more flexible and better positioned to meet modern demands.
各个领域的不同组织都在追寻一种相似的软件构建模式。这种系统鲁棒性更好、更有韧性, 更加灵活, 能更好地应对现代化开发的需要。
These changes are happening because application requirements have changed dramatically in recent years. Only a few years ago a large application had tens of servers, seconds of response time, hours of offline maintenance and gigabytes of data. Today applications are deployed on everything from mobile devices to cloud-based clusters running thousands of multi-core processors. Users expect millisecond response times and 100% uptime. Data is measured in Petabytes. Today's demands are simply not met by yesterday's software architectures.
由于系统需求近年来发生了巨大变化, 所以软件开发方式也正在改变。以前的大型应用系统会部署在几十台服务器, 响应时间大多是秒级, 可能还经常需要几个小时的离线维护, 数据量一般是GB级。今天的应用分布在各种移动终端, 服务端会部署到云集群上, 通常有上万个CPU核心在运转。用户需要的是毫秒级的响应时间, 而且期待的是100%的正常服务时间。数据量少则以PB为单位。过去的软件架构再也不能满足今天面临的各种需求。
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