Design an active-active multi-region architecture serving 500K requests/second globally with sub-100ms latency, handling data replication conflicts and regional failover without downtime.
## Problem
Design a multi-region active-active architecture where all regions simultaneously serve production read and write traffic. The system must handle data conflicts from concurrent writes across regions, route users to the lowest-latency region, and automatically failover when a region becomes unhealthy.
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Explain Cloud Region and AZ Architecture
Junior · Conceptual