Hacking The System Design Interview Stanley Chiang Pdf Better -

Memorizing these "rule of thumb" numbers helps you make quick decisions: Memory access is fast (100ns); Disk seek is slow (10ms). Availability: "Three nines" (99.9%) means ~9 hours of downtime per year. 1 million users with 1KB data each = 1GB of storage. 🏗️ Common Architecture Patterns

Chiang’s PDF tells you what components to use (e.g., "Use a message queue for async processing"). It does not teach you how to find the bottleneck in your specific design. Memorizing these "rule of thumb" numbers helps you