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Difficulty: EasyMulti-AZ, Multi-Region Architectures and Disaster Recovery (DR)

A company hosts a web application in the us-east-1 Region. The application stores static media files in an Amazon S3 bucket and uses an Amazon RDS for PostgreSQL database. To prepare for a disaster recovery (DR) scenario, the company wants to implement a Backup and Restore DR strategy in the us-west-2 Region. Which TWO options should a solutions architect recommend to copy the S3 objects and database backups to the secondary region?

  1. Enable Amazon S3 Cross-Region Replication (CRR) on the source S3 bucket to replicate new object uploads to a destination bucket in the secondary region.Answer
  2. Configure AWS Backup to automatically replicate Amazon RDS database backups and snapshots to the secondary region.Answer
  3. C
    Deploy an Amazon RDS Read Replica in the secondary region and rely on Route 53 latency routing to automatically fail over write traffic to the replica.
  4. D
    Copy database backups to an Amazon S3 Glacier Flexible Retrieval vault in the secondary region to restore the database in under 15 minutes during a disaster.
  5. E
    Establish a Pilot Light architecture by running a fully-scaled Amazon RDS database instance in the secondary region to avoid database startup time during failover.

Answer

The correct options are enabling Amazon S3 Cross-Region Replication (CRR) and using AWS Backup to replicate database backups to the secondary region.
For a Backup and Restore disaster recovery strategy, the primary goal is to copy backups to a secondary region. Enabling Amazon S3 Cross-Region Replication (CRR) handles S3 objects automatically, while AWS Backup handles replicating RDS snapshots to the target region. Both solutions keep replication simple without requiring running database instances in the recovery region.

Step-by-Step Solution

1
Select the correct replication method for S3 data.
Identify that S3 Cross-Region Replication (CRR) automatically replicates objects across regions.
S3 CRR is the standard and most efficient way to keep static files synchronized across different regions with minimal operational overhead.
2
Select the correct replication method for database backups.
Identify that AWS Backup is the standard managed service to copy RDS backups across regions automatically.
Using AWS Backup simplifies cross-region copy operations and centralized backup compliance management.
3
Evaluate and eliminate incorrect architectures.
Eliminate options proposing automatic failover to read replicas, S3 Glacier for quick retrieval, and running a fully-scaled instance under a Pilot Light model.
These options contain configuration misconceptions regarding RDS cross-region behavior, Glacier retrieval latencies, and DR tier definitions.

Key Concept

Disaster recovery data replication
Estimated Time:1m 0s
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Topics

Multi-AZ, Multi-Region Architectures and Disaster Recovery (DR)

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