Question

A financial services company runs an Azure Cosmos DB account with a single write region in East US and read regions in West Europe and Southeast Asia. Automatic failover is enabled. The operations team wants to validate their disaster recovery runbook by promoting West Europe to be the write region during a controlled maintenance window, without simulating an actual regional outage. What should they do?

Accepted Answer

Trigger a manual failover, which lets the team explicitly change the write region to West Europe in a controlled, no-data-loss manner.

Answer

Increase the automatic failover priority of West Europe to the highest level so it immediately becomes the write region.

Answer

Enable multi-region writes so that West Europe automatically accepts writes during the maintenance window.

Answer

Temporarily shut down the East US region from the Azure portal to force automatic failover to West Europe.