AWS Certified Solutions Architect Associate SAA-C03 Practice Question
An international financial organization must ensure their highly transactional application's operations can withstand the outage of a data center without any service interruption. Furthermore, the application should incur minimal latency for users in Europe, North America, and Asia. Considering cost-effectiveness and operational complexity, what deployment approach adheres BEST to these requirements?
Utilize one AWS Region to host the primary instance and establish cross-region read replicas in regions closest to Europe, North America, and Asia.
Establish the application in multiple AWS Regions each located near Europe, North America, and Asia, with an Amazon Route 53 latency-based routing policy.
Deploy the application into a single AWS Region and distribute it across multiple Availability Zones, leveraging Amazon Route 53 health checks for failover.
Implement a global database cluster with cross-region read replicas to ensure the application’s relational data remains available and experiences low latency accesses.
Geographic dispersal of the application across multiple AWS Regions close to the users provides for both high availability and optimized latency for users in different continents. This choice offers the advantage of maintaining application operations even if one AWS Region is down. A Multi-Region deployment is generally more cost-effective and operationally less complex than managing global clusters with cross-region read replicas. Deploying within a single region—even across multiple Availability Zones—does not offer protection against a regional outage. Global clusters provide a high level of resiliency and availability but may introduce unnecessary complexity and cost in this scenario, where regional deployments near user populations are sufficient. Using Amazon Route 53 with health checks alone does not address the requirement of operating during a regional data center outage.
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