AWS Certified Solutions Architect - Associate
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A company is looking for a solution that can store video archives in AWS from old news footage. The company needs to minimize costs and will rarely need to restore these files. When the files are needed, they must be available in a maximum of five minutes.
What is the MOST cost-effective solution?
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Community
UAnonymous
A
Store the video archives in Amazon S3 Glacier and use Expedited retrievals.
B
Store the video archives in Amazon S3 Glacier and use Standard retrievals.
C
Store the video archives in Amazon S3 Standard-Infrequent Access (S3 Standard-IA).
D
Store the video archives in Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA).
Explanation:
Explanation
The correct answer is A. Store the video archives in Amazon S3 Glacier and use Expedited retrievals.
Here's why:
Key Requirements Analysis:
- Minimize costs - Primary requirement
- Rarely need to restore files - Infrequent access pattern
- Maximum 5-minute retrieval time - Time-sensitive when needed
Storage Option Comparison:
Amazon S3 Glacier (Options A & B):
- Lowest storage cost among all S3 storage classes
- Designed for long-term archival and infrequent access
- Perfect for "rarely needed" video archives
S3 Standard-IA (Option C):
- Higher storage cost than Glacier
- Designed for infrequent access but not archival
- Faster retrieval but more expensive storage
S3 One Zone-IA (Option D):
- Lower cost than Standard-IA but higher than Glacier
- Data stored in only one Availability Zone (higher risk)
- Not suitable for valuable archival footage
Retrieval Options for Glacier:
Expedited retrievals (Option A):
- Retrieval time: 1-5 minutes
- Meets the "maximum of five minutes" requirement
- Higher retrieval cost but acceptable for rare retrievals
Standard retrievals (Option B):
- Retrieval time: 3-5 hours
- Does NOT meet the 5-minute requirement
- Lower retrieval cost but violates time constraint
Cost Optimization Strategy:
Since the company "will rarely need to restore these files," the primary cost driver is storage cost, not retrieval cost. S3 Glacier has the lowest storage cost, and Expedited retrievals ensure the 5-minute requirement is met when needed.
Why Not Other Options:
- Option B: Standard retrievals take 3-5 hours, violating the 5-minute requirement
- Option C: S3 Standard-IA has higher storage costs than Glacier
- Option D: S3 One Zone-IA has higher storage costs than Glacier and stores data in only one AZ, which is risky for valuable archival footage
Best Practice:
For long-term archival with infrequent access and retrieval time requirements, S3 Glacier with Expedited retrievals provides the optimal balance of lowest storage costs while meeting the 5-minute retrieval SLA when needed.
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