Interview question. A payment-profile database needs strongly consistent writes and must tolerate losing one region. Clients are in regions A, B, and C. Hypothetical round-trip times are 38 ms between A and B, 110 ms between A and C, and 95 ms between B and C. Explain leader and replica placement, estimate the communication part of write latency, and say what fails under a partition.
Reliability & Failure Recovery · Staff
How would you place a three-region write quorum to balance latency and consistency?
Designing Reliable Multi-Region Systems · Part 2 of 6 · 6 min read
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