Introduction
Azure Cosmos DB is an excellent global distributed, multi-model database service for high availability, low-latency access, and straightforward scalability. One of its most prominent characteristics is multi-region writes, whereby your applications write to the nearest regional replica, which greatly boosts performance and resilience.
But here’s the catch: enabling multi-region writes also introduces new challenges, especially when you’re architecting for disaster recovery (DR). Without careful planning, you can end up with data conflicts, unplanned downtime, or even data loss.