You can now create a replica cluster of your Azure Cosmos DB for MongoDB (vCore) in the same region where the primary cluster is hosted. This replica is continuously synchronized with the primary (read-write) cluster, ensuring data consistency.
Same-region replica clusters are ideal for offloading intensive read operations, such as dashboards serving tens of thousands of users, helping to reduce load on the primary cluster and to improve overall performance.
Additionally, if your primary cluster isn’t enabled for in-region high availability, the replica cluster can serve as an in-region disaster recovery solution. In the event of a failure, you can promote the replica cluster to become the new read-write cluster.
The global read-write connection string always points to the active write cluster. Your application can continue writing data without any changes after promoting the replica cluster—ensuring seamless failover and business continuity.