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Cloud Computing · Advanced

Multi-Site Active-Active

DR and availability strategy where full production capacity runs simultaneously in multiple regions, all serving traffic.

Definition

In active-active, two or more regions serve users concurrently, typically using global load balancing or latency-based DNS and multi-region data stores such as DynamoDB global tables or Spanner. It provides near-zero RTO and very low RPO at the highest cost and complexity, including data conflict handling.

Example

An app runs in us-east-1 and eu-west-1 with Route 53 latency routing and DynamoDB global tables.

Exam tip

Active-active is the only DR strategy with near-zero downtime; expect it when a question demands no interruption during a regional failure.

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