expertReal System Design Problems
Design a Distributed SQL Database (like Google Spanner) — global strong consistency.
The global-strong-consistency problem: how a database achieves strong consistency across geographically distributed nodes despite network delay, how a mechanism like TrueTime provides globally consistent timestamps, and what cross-region transactions actually cost in latency. This is asked almost exclusively for the most senior distributed-systems roles.
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Generate a complete, structured system design answer — requirements, capacity estimation, API design, architecture, database choice, scaling, caching, fault tolerance, security, trade-offs, and more, walked through the way a strong senior engineer would in a real interview.
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