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Answer: Deploy an Amazon RDS Multi-AZ DB instance with a single read replica directing read workloads to it.
The correct answer is A. Using an Amazon RDS Multi-AZ DB instance deployment with one read replica ensures high availability and offloads read operations from the primary instance, meeting the company's requirements. This configuration provides automatic failover support and addresses cost concerns by using a single read replica. Options B and D suggest using a DB cluster, which can be more costly due to additional read replicas. Option C incorrectly directs read workloads to secondary instances in a Multi-AZ pair, which are meant for failover, not read operations.
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A company seeks a highly available Amazon RDS PostgreSQL solution for production workloads with automatic failover in under 40 seconds and cost-effective read offloading. Which configuration meets these criteria?
A
Deploy an Amazon RDS Multi-AZ DB instance with a single read replica directing read workloads to it.
B
Deploy an Amazon RDS Multi-AZ DB cluster with two read replicas directing read workloads to them.
C
Deploy an Amazon RDS Multi-AZ DB instance and direct read workloads to the secondary instances.
D
Deploy an Amazon RDS Multi-AZ DB cluster and direct read workloads to the reader endpoint.
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