AWS Certified Solutions Architect - Associate
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A company has an application that runs on several Amazon EC2 instances. Each EC2 instance has multiple Amazon Elastic Block Store (Amazon EBS) data volumes attached to it. The application's EC2 instance configuration and data need to be backed up nightly. The application also needs to be recoverable in a different AWS Region.
Which solution will meet these requirements in the MOST operationally efficient way?
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A
Write an AWS Lambda function that schedules nightly snapshots of the application's EBS volumes and copies the snapshots to a different Region.
B
Create a backup plan by using AWS Backup to perform nightly backups. Copy the backups to another Region. Add the application's EC2 instances as resources.
C
Create a backup plan by using AWS Backup to perform nightly backups. Copy the backups to another Region. Add the application's EBS volumes as resources.
D
Write an AWS Lambda function that schedules nightly snapshots of the application's EBS volumes and copies the snapshots to a different Availability Zone.
Explanation:
Explanation
Correct Answer: C
Why Option C is correct:
- AWS Backup is a fully managed backup service that provides centralized backup management across AWS services.
- EBS volumes as resources: Since the requirement is to back up the EC2 instance configuration AND data volumes, adding EBS volumes as resources ensures both are backed up. AWS Backup can create application-consistent backups of EBS volumes that include the instance configuration.
- Cross-region copy: AWS Backup supports cross-region copy of backups, enabling recovery in a different AWS Region.
- Operational efficiency: AWS Backup is fully managed, requires minimal operational overhead, and provides automated scheduling, retention policies, and cross-region replication.
Why other options are incorrect:
Option A: While this would work, it's less operationally efficient because:
- Requires custom Lambda function development and maintenance
- Doesn't handle EC2 instance configuration backup
- Requires manual management of snapshot lifecycle and cross-region copy
Option B: Adding EC2 instances as resources to AWS Backup would primarily back up the instance metadata, but may not properly handle the attached EBS volumes' data consistency. AWS Backup works best when backing up EBS volumes directly for data consistency.
Option D: This is incorrect because:
- Copies snapshots to a different Availability Zone, not a different Region
- Availability Zone replication doesn't meet the cross-region recovery requirement
- Still requires custom Lambda development and maintenance
Key AWS Concepts:
- AWS Backup: Centralized backup service supporting multiple AWS services
- Cross-region copy: Built-in feature of AWS Backup for disaster recovery
- Application-consistent backups: AWS Backup can create consistent backups of EBS volumes using pre/post scripts
- Operational efficiency: Managed services reduce operational overhead compared to custom solutions
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