How to design a multi-region architecture on AWS

Short answer

Deploy active-active or active-passive architectures across AWS regions. Use Route 53 for geolocation or latency-based routing. Replicate data with DynamoDB Global Tables, Aurora Global Database, or S3 Cross-Region Replication.

Details

Multi-region architectures improve resilience against regional outages and reduce latency for global users. An active-active setup serves traffic from multiple regions simultaneously but requires conflict resolution for concurrent writes. Active-passive keeps a warm standby that you promote during a disaster, trading cost for simplicity.

Networking between regions uses VPC peering or Transit Gateway. For DNS and traffic management, see how to configure DNS records to understand failover routing logic. If you are automating this infrastructure, How to use Terraform for infrastructure as code ensures your regions stay consistent.

Tips

• Measure Recovery Time Objective (RTO) and Recovery Point Objective (RPO) before choosing a strategy.
• Use AWS CloudWatch cross-region dashboards to maintain a unified operational view.
• For a broader DR strategy, read How to implement disaster recovery in the cloud.