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Difficulty: HardBackup and Restore Management

A company has a critical application that stores backup archives in a primary Amazon S3 bucket. A SysOps Administrator must configure S3 Cross-Region Replication (CRR) to replicate these archives to a destination bucket in a secondary AWS Region for disaster recovery compliance. Additionally, the application database runs on an Amazon RDS for PostgreSQL instance. The database must be configured to automatically fail over to a standby instance in a different Availability Zone with minimal downtime if the primary instance becomes unavailable, while maintaining automated backups. Which actions must the SysOps Administrator take to meet these requirements? (Select TWO.)

  1. Enable Multi-AZ deployment on the RDS for PostgreSQL DB instance to provide automatic failover to a synchronous standby instance in another Availability Zone.Answer
  2. Enable S3 Versioning on both the source and destination S3 buckets, and configure a replication rule on the source bucket targeting the destination bucket.Answer
  3. C
    Create an Amazon RDS Read Replica in another Availability Zone and configure the application to automatically promote the read replica using Route 53 DNS failover.
  4. D
    Configure S3 Cross-Region Replication (CRR) on the source bucket without enabling versioning, relying on S3 object metadata to track changes.
  5. E
    Enable S3 Versioning only on the source bucket and configure a replication rule, allowing the destination bucket to automatically inherit the versioning status during replication.

Answer

Enable Multi-AZ deployment on the RDS for PostgreSQL DB instance, and enable S3 Versioning on both the source and destination S3 buckets while configuring the replication rule.
The solution requires configuring automated failover for RDS PostgreSQL and Cross-Region Replication for S3. Enabling Multi-AZ deployment on the RDS instance ensures synchronous replication and automated DNS failover to a standby instance in another Availability Zone. Enabling S3 Versioning on both source and destination S3 buckets is a mandatory prerequisite to configure S3 Cross-Region Replication successfully.

Step-by-Step Solution

1
Configure database high availability by modifying the RDS for PostgreSQL instance settings to enable the Multi-AZ deployment option.
Amazon RDS provisions a synchronous standby replica in a different Availability Zone and configures automatic DNS failover.
This satisfies the requirement for automatic database failover with minimal downtime.
2
Enable S3 Versioning on the source S3 bucket and the destination S3 bucket in the secondary Region.
Both buckets are now prepared to track object versions, which is a requirement for replication.
S3 Versioning is a strict prerequisite for Cross-Region Replication.
3
Configure the S3 replication rule on the source bucket targeting the destination bucket.
S3 automatically replicates new objects and object versions to the secondary Region.
This satisfies the disaster recovery replication compliance requirement.

Key Concept

Configuring RDS Multi-AZ for automated database failover and configuring S3 Cross-Region Replication (which requires versioning on both source and destination buckets) for backup storage reliability.
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Topics

Backup and Restore Management

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