2000年，UCB的Eric Brewer针对distributed system提出CAP的概念。简单的说，任何系统都只能满足CAP中的两个，而牺牲第三个。
“既要”，“又要”，和“还要”，在父母看待子女日后发展中很常见，紫檀讨论也不列外。那么子女发展的CAP是什么？我认为，收入，工作轻松，和兴趣。
收入高，符合兴趣的，再追求工作轻松，就不大可能了。
收入高，工作还轻松，肯定不符合兴趣，早晚孩子会无聊，会躺平。
工作轻松，还符合兴趣，收入就不要去苛求了。
PS CAP
Initial Concept: Brewer proposed that a distributed system can only guarantee at most two of the following three properties simultaneously:
- Consistency (C): All nodes see the same data at the same time.
- Availability (A): Every request receives a response, whether successful or failed.
- Partition Tolerance (P): The system continues to operate despite network partitions.
