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https://www.hiredintech.com/classrooms/system-design/lesson/55 https://www.educative.io/collection/5668639101419520/5649050225344512

Five Steps for the System Design

Step 1. Constraints and use cases (Requirement & Use Case clarify) Clarify the system's constraints and to identify what use cases the system needs to satisfy.

Step 2: Abstract design, core system class and overview arch try to address every constraint and use case.

Step 3: Object Interaction Diagram for each user cases. Refine Design in #Step 2

Step 4: Understanding bottlenecks Or Issues

Step 5: Scaling your abstract design/Close issues

System design need think about following aspects

  • Ease to use
  • Flexibility for future changing or demands requirements
  • Scalability
  • Efficiency
  • Different domain system many have different issues need care. For network server, we need think about balance/huge user/etc.

SOLID principles

https://en.wikipedia.org/wiki/SOLID

  • Single responsibility principle -- a class should have only a single responsibility
  • Open/closed principle -- open for extension, but closed for modification.
  • Liskov substitution principle -- objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
  • Interface segregation principle -- many client-specific interfaces are better than one general-purpose interface
  • Dependency inversion principle -- depend upon abstractions, [not] concretions

Reference Class

Grokking the System Design Interview http://t.cn/EInHDXQ

Intro to:Architecture and Systems Designs http://t.cn/EzFLeYN

What every software engineer should know about real-time data’s unifying abstraction http://t.cn/RLftRL4

《系统设计入门》 http://t.cn/RXVkSUL

Freeman Zhang 的 System design 总结 http://t.cn/R0Hn8lZ

http://t.cn/EInQeY6 http://t.cn/EIn8hPd