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Focuses on basics like scaling from 0 to 1 million users, back-of-the-envelope estimations, and consistent hashing. Key case studies include designing a Rate Limiter , URL Shortener , and Notification System .
Example for URL shortener with 100M writes/month, 10B reads/month:
One weakness of the Alex Xu PDF (if you only skim) is that it assumes you know the math. You must practice:
Before the book existed, Alex Xu wrote a legendary newsletter on Medium and Substack (now moved to ByteByteGo.com).
