System Design Interview Ch 2 粗略估算

在系統設計面試關卡中，經常會要求面試者粗略估算來評估系統容量或效能需求。估算的目的都是為了系統的可擴展性（Scalability）。 back-of-the-envelope calculations are estimates you create using a combination of thought experiments and common performance numbers to get a good feel for which designs will meet yo...