AWS Certified Solutions Architect - Associate
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A company stores its data objects in Amazon S3 Standard storage. A solutions architect has found that 75% of the data is rarely accessed after 30 days. The company needs all the data to remain immediately accessible with the same high availability and resiliency, but the company wants to minimize storage costs.
Which storage solution will meet these requirements?
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UAnonymous
A
Move the data objects to S3 Glacier Deep Archive after 30 days.
B
Move the data objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 30 days.
C
Move the data objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 30 days.
D
Move the data objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) immediately.
Explanation:
Explanation
Correct Answer: B
Why Option B is correct:
- Immediate accessibility: S3 Standard-IA provides immediate access to data (millisecond retrieval) unlike S3 Glacier Deep Archive which has retrieval times ranging from hours to days.
- Same high availability and resiliency: S3 Standard-IA offers 99.9% availability and 99.999999999% durability (11 nines), which matches the high availability and resiliency requirements of S3 Standard.
- Cost optimization: S3 Standard-IA has lower storage costs than S3 Standard but higher retrieval costs, which is suitable for infrequently accessed data (75% of data rarely accessed after 30 days).
- 30-day lifecycle: Moving data after 30 days aligns with the finding that 75% of data is rarely accessed after this period.
Why other options are incorrect:
A. S3 Glacier Deep Archive:
- Does NOT provide immediate accessibility (retrieval times: 12 hours for standard, up to 48 hours for bulk)
- Not suitable for data that needs to remain "immediately accessible"
C. S3 One Zone-IA:
- Does NOT provide the "same high availability and resiliency" as S3 Standard
- Stores data in only one Availability Zone (lower availability: 99.5% vs 99.9%)
- Lower durability (99.999999999% but only within one zone)
- Higher risk of data loss if the single zone fails
D. S3 One Zone-IA immediately:
- Same issues as option C regarding availability and resiliency
- Additionally, moving data immediately would not optimize costs effectively since some data might still be frequently accessed in the first 30 days
Key AWS Concepts:
- S3 Standard-IA: For infrequently accessed data that requires rapid access when needed
- S3 One Zone-IA: For infrequently accessed data that can be recreated if lost (lower availability)
- S3 Glacier Deep Archive: For archival data with retrieval times of hours
- S3 Lifecycle Policies: Automatically transition objects between storage classes based on age
Best Practice: Use S3 Standard-IA for data that is infrequently accessed but still needs immediate availability and high durability, which perfectly matches the requirements in this scenario.
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