Why adding a cache node shouldn’t move every key
7 min read The math behind hash rings, why virtual nodes exist, and what a designer probes the moment you reach for consistent hashing. Read article
System Design
System Design
How to design a URL shortener that survives real traffic
6 min read The design choices behind a URL shortener that interviewers actually probe, from short-code generation to caching and the 301-versus-302 redirect. Read article
System Design
The caching patterns worth knowing cold for a system design round
6 min read A quick reference to the read and write caching patterns, eviction policies, invalidation, and stampede fixes that come up in system design interviews. Read article
System Design
Where caching helps your system design and where it bites
7 min read How to reason about cache-aside, write-through, invalidation, and cache stampedes when an interviewer keeps pushing on your design. Read article
System Design
Designing a news feed and where fanout falls apart
7 min read How push, pull, and hybrid feed generation behave in a system design interview, and the point where each one stops working. Read article
