AWS Certified Solutions Architect Associate SAA-C03 Practice Question
An organization aims to maintain operational continuity of its critical workload even if an entire data center servicing their region encounters an outage. Their solution includes computing resources distributed across diverse physical locations within the same geographical area. To enhance the system's robustness, which strategy should be implemented for the data layer?
Configure an active-passive setup using a secondary region and enact health checks to direct traffic upon failure.
Install a globally distributed database with read replicas in various regions for geographical data distribution.
Introduce a Load Balancer to distribute traffic among database instances to minimize the impact of a location outage.
Implement a Multi-AZ configuration for the relational database to promote automatic failover and data redundancy.
The question asks what can you do to maintain operational continuity if one data center in a region has an outage. Keep in mind that with AWS, one region is made of many data centers groups into availability zones. Therefor, a multi-AZ setup would help mitigate and prevent outages during a data center outage.
Choosing a Multi-AZ deployment for an RDS instance provides high availability by automatically maintaining a synchronous standby replica in a different data center, or Availability Zone. In case of an infrastructure failure, the database will fail over to the standby so that database operations can resume quickly without manual intervention. This choice is the most aligned with the requirement for operational continuity within a single region in the face of a data center outage. The other answers either describe strategies that introduce geographical redundancy, which goes beyond the scope of the question, or load balancing, which does not address the need for automatic failover at the data layer.
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