Running Apps Across Regions: Routing, Databases, and Failover for Stateful Workloads

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The guide explains that multi-region deployments rely on deploying the same stateless services from one definition to every region, with a health-checked global routing layer sending users to the nearest healthy region. Each database needs its own data topology, such as a single primary with replicas, multi-primary, or distributed SQL, chosen according to tolerance for write latency and data loss. Stateless services fail over through routing changes, whereas databases require promotion steps that must be designed and tested in advance. Automatic failover depends on quorum, so two locations tolerate no location loss, three tolerate one, and five tolerate two. The article notes it is published by Control Plane, which offers a multi-location platform and database templates.

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