Random Bulletin

Sep 30, 2026 · Backend Development

Cross-Region Disaster Recovery: From Backup to Multi-Active at 10M QPS

This article systematically dissects the engineering evolution from disaster backup to multi-active architecture, covering fault domain isolation, RTO/RPO/recovery capacity metrics, data replication trade-offs, traffic switching state machines, business unitization, conflict convergence, and a phased adoption roadmap for systems operating at ten million QPS.