Question

A financial services company runs a single-write-region Cosmos DB account with the write region in East US and read regions in West US and North Europe. They have enabled service-managed (automatic) failover and configured failover priorities as: 0 = East US, 1 = North Europe, 2 = West US. During a regional outage that makes East US unavailable, what happens to the write region?

Accepted Answer

Cosmos DB automatically promotes North Europe to the new write region based on the configured failover priority.

Answer

Writes are unavailable until an administrator manually triggers a failover to a healthy region.

Answer

Cosmos DB automatically promotes West US to the new write region because it has the lowest network latency to clients.

Answer

The account is converted to a multi-region write account so all remaining regions accept writes.