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: This sequel, co-authored by Sahn Lam, covers 13 advanced scenarios such as designing a stock exchange, a digital wallet, and a metrics monitoring system. Machine Learning System Design Interview

| Component | Latency (Approx) | | :--- | :--- | | L1 Cache Reference | 0.5 ns | | Main Memory Reference | 100 ns | | Mutex Lock/Unlock | 25 ns | | Send 2K bytes over 1 Gbps network | 20,000 ns | | Disk Seek (SSD) | 16,000 ns (16 µs) | | Disk Seek (HDD) | 10,000,000 ns (10 ms) | | Round trip in same data center | 500,000 ns (0.5 ms) |