AWS Certified Solutions Architect – Associate (SAA-C02) — Question 323
A company requires that all versions of objects in its Amazon S3 bucket be retained. Current object versions will be frequently accessed during the first 30 days, after which they will be rarely accessed and must be retrievable within 5 minutes. Previous object versions need to be kept forever, will be rarely accessed, and can be retrieved within 1 week. All storage solutions must be highly available and highly durable.
What should a solutions architect recommend to meet these requirements in the MOST cost-effective manner?
Answer options
- A. Create an S3 lifecycle policy for the bucket that moves current object versions from S3 Standard storage to S3 Glacier after 30 days and moves previous object versions to S3 Glacier after 1 day.
- B. Create an S3 lifecycle policy for the bucket that moves current object versions from S3 Standard storage to S3 Glacier after 30 days and moves previous object versions to S3 Glacier Deep Archive after 1 day.
- C. Create an S3 lifecycle policy for the bucket that moves current object versions from S3 Standard storage to S3 Standard-infrequent Access (S3 Standard-IA) after 30 days and moves previous object versions to S3 Glacier Deep Archive after 1 day.
- D. Create an S3 lifecycle policy for the bucket that moves current object versions from S3 Standard storage to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 30 days and moves previous object versions to S3 Glacier Deep Archive after 1 day.
Correct answer: B
Explanation
Option B is the most cost-effective choice because transitioning current versions to S3 Glacier after 30 days meets the 5-minute retrieval requirement through Expedited retrievals, while being cheaper than S3 Standard-IA. For previous versions, S3 Glacier Deep Archive is the most economical option and easily meets the 1-week retrieval requirement with its standard 12-hour retrieval time. Option D is incorrect because S3 One Zone-IA does not provide the high availability across multiple availability zones required by the scenario.