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Difficulty: HardResilient Database Configurations and High Availability

An enterprise is deploying a critical SQL-based retail application across two AWS Regions: eu-west-1 as the primary region and us-east-1 as the disaster recovery region. The application requires a database that can handle heavy read traffic locally in both regions. For disaster recovery, the solutions architect must design a database tier that achieves a Recovery Point Objective (RPO) of less than 1 second and a Recovery Time Objective (RTO) of less than 5 minutes.

Which combination of actions must the solutions architect take to meet these requirements? (Select TWO.)

  1. Deploy an Amazon Aurora Global Database with the primary database cluster in eu-west-1 and a secondary database cluster in us-east-1.Answer
  2. Promote the secondary database cluster in us-east-1 to take over as the primary cluster in the event of a regional outage in eu-west-1.Answer
  3. C
    Deploy a primary Amazon RDS for PostgreSQL instance in eu-west-1 with Multi-AZ enabled, and configure a cross-region read replica in us-east-1 to serve as the automatic failover target.
  4. D
    Use Amazon Route 53 Latency routing policy with health checks to automatically direct database write traffic to the cross-region read replica in us-east-1 during an outage.
  5. E
    Configure AWS Pilot Light disaster recovery for Amazon Aurora by keeping the database cluster in us-east-1 turned off, and start the cluster only when a failover is initiated.

Answer

Deploy an Amazon Aurora Global Database with the primary DB cluster in eu-west-1 and a secondary DB cluster in us-east-1, and promote the secondary cluster to primary in the event of an outage.
Deploying Amazon Aurora Global Database provides storage-level replication across AWS Regions with replication latency under 1 second, meeting the Recovery Point Objective (RPO) requirement. Promoting the secondary cluster in the event of a primary region outage can be completed in less than 1 minute, which aligns with the Recovery Time Objective (RTO) requirement of under 5 minutes while allowing local read scaling in the secondary region.

Step-by-Step Solution

1
Select a multi-region database solution that supports SQL and storage-level replication.
Choose Amazon Aurora Global Database to achieve low-latency asynchronous replication across regions.
Aurora Global Database replicates data to secondary regions with a latency of less than 1 second, meeting the RPO requirement of < 1 second.
2
Enable read scaling in the secondary region.
The secondary cluster in us-east-1 is active and can serve read-only queries locally to users in that region.
This offloads read traffic from the primary region and improves local application performance.
3
Establish a disaster recovery promotion procedure.
Promoting the secondary cluster to primary read-write capability takes less than 1 minute.
This promotion meets the RTO requirement of under 5 minutes during a regional outage.

Key Concept

Amazon Aurora Global Database provides cross-region disaster recovery and read scaling by utilizing storage-based replication with latency under 1 second and promotion capabilities under 1 minute.
Estimated Time:2m 0s
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Topics

Resilient Database Configurations and High Availability

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