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Answer: Store all the objects in S3 Standard with an S3 Lifecycle rule to transition the objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 30 days.
## Explanation **Correct Answer: B** **Why Option B is correct:** 1. **Maximizes durability**: S3 Standard and S3 Standard-IA both provide 99.999999999% (11 9's) durability across multiple Availability Zones. 2. **Readily available at any time**: Both storage classes provide immediate access to objects without retrieval delays. 3. **Cost-effective for access patterns**: - Objects accessed frequently in first 30 days → S3 Standard is appropriate - Objects accessed less frequently after 30 days → S3 Standard-IA has lower storage costs but higher retrieval costs - Since access is "much less likely" after 30 days, the lower storage costs of S3 Standard-IA outweigh the higher retrieval costs 4. **No retrieval delays**: Unlike S3 Glacier, there are no retrieval delays or retrieval fees. **Why other options are incorrect:** **A (S3 Glacier)**: - S3 Glacier has retrieval delays (minutes to hours) and retrieval fees - Objects are not "readily available at any time" as required - Glacier is designed for archival storage, not for infrequent access **C (S3 One Zone-IA)**: - Only stores data in a single Availability Zone - Lower durability (99.999999999% but only in one zone vs. multiple zones) - Does not "maximize object durability" as required - Higher risk of data loss if the zone fails **D (S3 Intelligent-Tiering)**: - Intelligent-Tiering automatically moves objects between frequent and infrequent access tiers - Adding a Lifecycle rule to transition to S3 Standard-IA after 30 days is redundant and potentially more expensive - Intelligent-Tiering has monitoring and automation fees - The requirement is simple enough that a straightforward Lifecycle policy is more cost-effective **Key considerations:** - The requirement emphasizes "maximize object durability" → eliminates single-zone options - "Readily available at any time" → eliminates Glacier/archive options - Cost-effectiveness for the described access pattern → S3 Standard-IA after 30 days provides the best balance of durability, availability, and cost for infrequently accessed objects.
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A solutions architect is designing an application that will allow business users to upload objects to Amazon S3. The solution needs to maximize object durability. Objects also must be readily available at any time and for any length of time. Users will access objects frequently within the first 30 days after the objects are uploaded, but users are much less likely to access objects that are older than 30 days.
Which solution meets these requirements MOST cost-effectively?
A
Store all the objects in S3 Standard with an S3 Lifecycle rule to transition the objects to S3 Glacier after 30 days.
B
Store all the objects in S3 Standard with an S3 Lifecycle rule to transition the objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 30 days.
C
Store all the objects in S3 Standard with an S3 Lifecycle rule to transition the objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 30 days.
D
Store all the objects in S3 Intelligent-Tiering with an S3 Lifecycle rule to transition the objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 30 days.