SAA-C03 Question 401
Select 2A company processes large amounts of critical data daily and stores it in an Amazon S3 bucket. The company wants to implement a backup strategy to ensure high durability and disaster recovery, while also optimizing costs. Which of the following strategies should the company implement?
- A
Enable versioning on the S3 bucket and configure a lifecycle policy to transition previous versions to S3 Glacier.
- B
Set up cross-region replication (CRR) to replicate the S3 bucket to another AWS Region.
- C
Create a daily backup of the S3 bucket using AWS Backup and store it in Amazon EBS snapshots.
- D
Enable S3 bucket logging and archive the logs to an S3 Glacier storage class.
- E
Use AWS DataSync to schedule regular backups of the S3 bucket to on-premises storage.
Show answer and explanation
Correct answers: A, B
Explanation
The correct answers involve leveraging built-in S3 features for backup and disaster recovery. Enabling versioning ensures data durability by retaining all versions of objects, and transitioning old versions to S3 Glacier optimizes costs. Cross-region replication provides an additional layer of disaster recovery by replicating data to another Region. The other options either do not apply to S3 backup strategies or do not align with the company's requirements for durability, disaster recovery, and cost optimization.
- A. Correct.
Enabling versioning ensures that all versions of an object are preserved, and using lifecycle policies to transition previous versions to S3 Glacier reduces storage costs while maintaining long-term backups.
- B. Correct.
Cross-region replication (CRR) ensures that the data is replicated to another AWS Region, providing disaster recovery and high availability in case of a regional outage.
- C. Incorrect.
AWS Backup does not support direct backups of S3 buckets. Additionally, using EBS snapshots is not suitable for S3 data as EBS is designed for block storage, not object storage.
- D. Incorrect.
S3 bucket logging is used for tracking access requests, not for backing up data. Archiving logs to S3 Glacier is unrelated to backing up the critical data in this scenario.
- E. Incorrect.
AWS DataSync is designed for moving or synchronizing data between storage locations, such as on-premises and AWS, but it is not specifically a backup solution. Regular backups to on-premises storage may not meet the company's requirement for high durability.