An e-commerce company requires a multi-region active-active architecture for its critical order processing system. The database layer uses Amazon Aurora PostgreSQL. The application must tolerate a complete region failure with an RPO of less than 1 second and an RTO of less than 1 minute. How should the architect design the database layer?

Answer options:

Use Aurora Global Database. Configure the application to write to the primary region and read from the secondary. On failure, promote the secondary.

Use Amazon RDS for PostgreSQL with Cross-Region Read Replicas. On failure, promote the replica.

Use DynamoDB Global Tables with PostgreSQL compatibility enabled.

Use Aurora Multi-Master across two regions.

How to approach this question

Match the RPO/RTO requirements with Aurora Global Database capabilities.

Full Answer

A.Use Aurora Global Database. Configure the application to write to the primary region and read from the secondary. On failure, promote the secondary.✓ Correct

Use Aurora Global Database. In the event of a region failure, promote the secondary region to primary.

Aurora Global Database replicates data with no impact on database performance, provides typical lag of under a second, and allows secondary region promotion in under a minute.

Common mistakes

Assuming Multi-Master works across regions.

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