AWS Certified Solutions Architect - Associate
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A company runs a website that stores images of historical events. Website users need the ability to search and view images based on the year that the event in the image occurred. On average, users request each image only once or twice a year. The company wants a highly available solution to store and deliver the images to users.
Which solution will meet these requirements MOST cost-effectively?
Other
Community
UAnonymous
A
Store images in Amazon Elastic Block Store (Amazon EBS). Use a web server that runs on Amazon EC2.
B
Store images in Amazon Elastic File System (Amazon EFS). Use a web server that runs on Amazon EC2.
C
Store images in Amazon S3 Standard. Use S3 Standard to directly deliver images by using a static website.
D
Store images in Amazon S3 Standard-Infrequent Access (S3 Standard-IA). Use S3 Standard-IA to directly deliver images by using a static website.
Explanation:
Explanation
Why Option D is the most cost-effective solution:
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Infrequent Access Pattern: The question states that "users request each image only once or twice a year." This is a perfect use case for S3 Standard-IA (Infrequent Access), which is designed for data that is accessed less frequently but requires rapid access when needed.
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Cost Optimization:
- S3 Standard-IA has lower storage costs than S3 Standard but has retrieval fees
- For infrequent access (1-2 times per year), the lower storage costs outweigh the retrieval fees
- S3 Standard would be more expensive for this access pattern
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High Availability: S3 provides 99.99% availability by default, meeting the requirement for a highly available solution.
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Static Website Hosting: S3 can directly serve static content (images) through static website hosting, eliminating the need for EC2 instances and reducing operational overhead.
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Comparison with other options:
- Option A (EBS + EC2): Expensive due to EC2 instance costs, EBS volumes, and requires management overhead
- Option B (EFS + EC2): EFS is more expensive than S3 for this use case, plus EC2 costs
- Option C (S3 Standard): More expensive storage than S3 Standard-IA for infrequently accessed data
Key AWS Concepts:
- S3 Storage Classes:
- S3 Standard: For frequently accessed data
- S3 Standard-IA: For infrequently accessed data that requires rapid access
- S3 Glacier: For archival data with retrieval times of minutes to hours
- S3 Static Website Hosting: Allows serving static content directly from S3 without web servers
- Cost Optimization: Matching storage class to access patterns is crucial for cost-effective solutions
This solution provides the required high availability while minimizing costs for the given access pattern.
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