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Difficulty: Very hardBackup and Restore Management

A SysOps administrator must establish a disaster recovery and backup strategy for an application hosted in us-east-1. The application uses an Amazon S3 bucket for object storage and an Amazon RDS for MySQL DB instance. The architecture must satisfy the following criteria:
1. All objects uploaded to the S3 bucket must be replicated to a bucket in us-west-2 while preserving their version history.
2. The database must achieve a Recovery Time Objective (RTO) of less than 2 minutes during an Availability Zone outage in us-east-1 without manual intervention or DNS endpoint updates.
3. Database backups must be copied to us-west-2 daily.

Which two actions should the SysOps administrator take to meet these requirements? (Select TWO.)

  1. Enable S3 Versioning on both the source S3 bucket in us-east-1 and the destination S3 bucket in us-west-2, and configure an S3 Cross-Region Replication (CRR) rule.Answer
  2. B
    Configure an S3 Cross-Region Replication (CRR) rule from the source S3 bucket in us-east-1 to the destination S3 bucket in us-west-2 while keeping versioning disabled on both buckets.
  3. Modify the primary RDS MySQL DB instance to a Multi-AZ deployment, and configure the automated backups to copy snapshots to us-west-2 daily.Answer
  4. D
    Deploy an RDS MySQL read replica in a different Availability Zone within us-east-1, and configure an Amazon Route 53 CNAME record with a short TTL pointing to the replica for automated failover.
  5. E
    Configure an Amazon Route 53 active-active failover routing policy between the primary RDS MySQL instance and a cross-Region read replica in us-west-2 to handle write traffic during an outage.

Answer

Enable S3 Versioning on both the source and destination buckets, configure S3 Cross-Region Replication, modify the primary RDS instance to a Multi-AZ deployment, and configure automated snapshot copies to the destination Region.
Enabling versioning on both source and destination S3 buckets is a prerequisite for Cross-Region Replication (CRR). Multi-AZ deployment for Amazon RDS provides synchronous replication and automated DNS failover during an AZ outage, meeting the RTO requirement without manual DNS updates.

Step-by-Step Solution

1
Verify S3 replication requirements.
Determine that versioning must be enabled on both source and destination buckets before setting up Cross-Region Replication (CRR).
S3 replication relies on version IDs to track and copy objects accurately across buckets.
2
Evaluate DB failover mechanisms for RTO and automation.
Select Multi-AZ deployment over Read Replicas for automatic DNS redirection and synchronous replication.
Multi-AZ deployments automate the failover process within minutes using DNS updates managed by AWS, whereas Read Replicas require manual promotion and endpoint updates.
3
Identify the snapshot copy strategy.
Configure automated DB snapshot copies to the target Region.
This satisfies the requirement for daily copies to the destination Region for disaster recovery.

Key Concept

Implementing cross-Region replication for Amazon S3 and configuring high availability with automated cross-Region backup copying for Amazon RDS.
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Topics

Backup and Restore Management

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