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Difficulty: MediumHigh Availability and Disaster Recovery Design

An enterprise is designing a multi-region disaster recovery (DR) architecture for a web-based learning management system. The primary workload runs in the us-east-1 Region, and the DR workload runs in the us-west-2 Region. The architecture must achieve a Recovery Point Objective (RPO) of 1 minute and a Recovery Time Objective (RTO) of 15 minutes. The database tier uses an Amazon Aurora PostgreSQL DB cluster. Which combination of actions should a Solutions Architect take to meet these requirements? (Select TWO.)

  1. Establish an Amazon Aurora Global Database with the primary cluster in us-east-1 and a secondary cluster in us-west-2.Answer
  2. Create Amazon Route 53 failover routing records with active-passive configuration, and associate them with health checks on the Application Load Balancers.Answer
  3. C
    Implement Route 53 latency-based routing records to automatically direct client requests to the secondary region if the primary region's latency increases during an outage.
  4. D
    Configure synchronous database replication between us-east-1 and us-west-2 by deploying a single Aurora DB cluster spanning both Regions.
  5. E
    Deploy a single NAT Gateway in each Region's primary Availability Zone to route outbound internet traffic from the private subnets.
  6. F
    Configure Route 53 Private Hosted Zones and associate them only with the us-east-1 VPC, relying on Route 53 Resolver outbound endpoints for cross-region resolution.

Answer

Establish an Amazon Aurora Global Database with the primary cluster in us-east-1 and a secondary cluster in us-west-2, and create Amazon Route 53 failover routing records with active-passive configuration associated with health checks on the Application Load Balancers.
To meet the RPO of 1 minute and RTO of 15 minutes, the database replication must be continuously active and low-latency, which is achieved by establishing an Amazon Aurora Global Database. To redirect user traffic during a regional outage, Route 53 failover routing records must be created in an active-passive configuration, which uses health checks to detect failure of the primary Application Load Balancer and dynamically direct requests to the secondary region.

Step-by-Step Solution

1
Determine database replication requirements to meet the 1-minute RPO.
Identify that Amazon Aurora Global Database uses fast asynchronous replication across Regions, keeping the RPO well under 1 minute.
Standard cross-region replication is required as Aurora clusters cannot span multiple Regions, and manual processes would violate the strict RPO.
2
Identify the routing mechanism for active-passive multi-region failover.
Select Amazon Route 53 failover routing policy configured with health checks on the Application Load Balancers.
This configuration ensures that traffic is automatically redirected to the healthy secondary region if the primary region's load balancer becomes unhealthy.
3
Verify high availability constraints within each region.
Ensure redundant NAT Gateways are deployed in each Availability Zone and Private Hosted Zones are associated with all VPCs.
This guarantees that local infrastructure failures do not prevent the DR region from operating successfully during a failover event.

Key Concept

Multi-region disaster recovery using Amazon Aurora Global Database and Route 53 active-passive failover routing.
Estimated Time:2m 0s
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Topics

High Availability and Disaster Recovery Design

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