AWS Certified Solutions Architect - Associate
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A solutions architect needs to implement a solution to reduce a company's storage costs. All the company's data is in the Amazon S3 Standard storage class. The company must keep all data for at least 25 years. Data from the most recent 2 years must be highly available and immediately retrievable.
Which solution will meet these requirements?
Other
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UAnonymous
A
Set up an S3 Lifecycle policy to transition objects to S3 Glacier Deep Archive immediately.
B
Set up an S3 Lifecycle policy to transition objects to S3 Glacier Deep Archive after 2 years.
C
Use S3 Intelligent-Tiering. Activate the archiving option to ensure that data is archived in S3 Glacier Deep Archive.
D
Set up an S3 Lifecycle policy to transition objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) immediately and to S3 Glacier Deep Archive after 2 years.
Explanation:
Explanation
Correct Answer: B
Why Option B is correct:
- Data from the most recent 2 years must be highly available and immediately retrievable - This means data less than 2 years old should remain in S3 Standard (which provides immediate retrieval).
- Data must be kept for at least 25 years - This is a long-term retention requirement.
- S3 Glacier Deep Archive is designed for long-term data retention (minimum 180 days storage duration) with retrieval times of 12-48 hours, making it cost-effective for archival data.
- Transitioning after 2 years ensures that recent data (0-2 years) stays in S3 Standard for immediate access, while older data (2+ years) moves to Glacier Deep Archive for cost savings.
Why other options are incorrect:
Option A: Transitioning to Glacier Deep Archive immediately would violate the requirement for immediate retrievability of data from the most recent 2 years, as Glacier Deep Archive has 12-48 hour retrieval times.
Option C: S3 Intelligent-Tiering with archiving option automatically moves data between access tiers, but it doesn't provide the precise 2-year control needed. The archiving option moves data to Glacier Deep Archive after 90 days of no access, which doesn't align with the 2-year requirement.
Option D: Transitioning to S3 One Zone-IA immediately would reduce costs but:
- S3 One Zone-IA stores data in only one Availability Zone, which doesn't provide the same durability as S3 Standard (which stores data across multiple AZs)
- The requirement states data must be "highly available" for the first 2 years, and S3 One Zone-IA has lower availability (99.5% vs 99.99% for S3 Standard)
- It still transitions to Glacier Deep Archive after 2 years, but the immediate transition to One Zone-IA violates the high availability requirement
Key AWS Concepts:
- S3 Lifecycle policies automate transitioning objects between storage classes based on age
- S3 Standard provides immediate access, high durability (99.999999999%), and high availability (99.99%)
- S3 Glacier Deep Archive is the lowest-cost storage class for long-term archival with retrieval times of 12-48 hours
- Retention requirements dictate when data should be moved to more cost-effective storage classes
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