SAP-C02 Question 271
Select 3Your company is designing a multi-region disaster recovery (DR) solution for a mission-critical application. The application stores user-uploaded files in Amazon S3, transactional data in Amazon RDS (MySQL), and session data in Amazon ElastiCache (Redis). The goal is to achieve minimal downtime in the event of a regional failure. Which combination of strategies would best meet these requirements?
- A
Enable Amazon S3 Cross-Region Replication (CRR) for the bucket storing user-uploaded files.
- B
Set up Amazon RDS Multi-AZ Deployment with automatic failover.
- C
Configure Amazon RDS Read Replica in another region.
- D
Use ElastiCache Global Datastore for Redis to replicate session data across regions.
- E
Configure Amazon RDS backup snapshots and manually restore in the DR region upon failure.
- F
Use Amazon S3 Transfer Acceleration to sync files between regions in real time.
Show answer and explanation
Correct answers: A, C, D
Explanation
To achieve minimal downtime in a multi-region DR solution, key components of the application must be replicated across regions. Amazon S3 Cross-Region Replication ensures durability of user-uploaded files, Amazon RDS Read Replica in another region provides resilience for transactional data, and ElastiCache Global Datastore ensures session data continuity. These strategies together allow the application to recover quickly and maintain functionality during a regional failure.
- A. Correct.
Enabling Amazon S3 Cross-Region Replication ensures that user-uploaded files are automatically replicated to a bucket in a secondary region, providing high availability and data durability in case of a regional failure.
- B. Incorrect.
Amazon RDS Multi-AZ Deployment only provides high availability within the same region, not across multiple regions. It does not meet the requirement for a multi-region DR solution.
- C. Correct.
Configuring an Amazon RDS Read Replica in another region allows for replication of transactional data to the DR region, enabling faster recovery by promoting the replica to a primary instance if the primary region fails.
- D. Correct.
ElastiCache Global Datastore for Redis replicates session data across regions, ensuring session continuity and resilience against regional failures.
- E. Incorrect.
Relying on manual restoration from Amazon RDS snapshots introduces significant downtime, which does not align with the requirement for minimal downtime.
- F. Incorrect.
Amazon S3 Transfer Acceleration is designed to improve transfer speeds over long distances but does not provide real-time or automated replication capabilities.