AWS Certified Solutions Architect - Associate
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An ecommerce company hosts its analytics application in the AWS Cloud. The application generates about 300 MB of data each month. The data is stored in JSON format. The company is evaluating a disaster recovery solution to back up the data. The data must be accessible in milliseconds if it is needed, and the data must be kept for 30 days.
Which solution meets these requirements MOST cost-effectively?
Other
Community
UAnonymous
A
Amazon OpenSearch Service (Amazon Elasticsearch Service)
B
Amazon S3 Glacier
C
Amazon S3 Standard
D
Amazon RDS for PostgreSQL
Explanation:
Explanation
Correct Answer: C - Amazon S3 Standard
Key Requirements Analysis:
- Data volume: 300 MB per month (very small amount)
- Data format: JSON
- Accessibility: Must be accessible in milliseconds if needed
- Retention: 30 days
- Cost-effectiveness: Most cost-effective solution
Option Analysis:
A. Amazon OpenSearch Service (Amazon Elasticsearch Service)
- Designed for search and analytics, not primarily for backup/disaster recovery
- More expensive than S3 for simple storage
- Overkill for just storing 300 MB of JSON data
- Not the most cost-effective option
B. Amazon S3 Glacier
- Designed for long-term archival storage
- Has retrieval times ranging from minutes to hours (not milliseconds)
- Retrieval costs apply when accessing data
- Not suitable for millisecond accessibility requirement
C. Amazon S3 Standard
- Millisecond access: S3 provides millisecond access to objects
- Cost-effective: For 300 MB per month, S3 Standard is very inexpensive
- Retention: Can store data for 30 days easily
- JSON support: Perfect for storing JSON files
- Durability: 99.999999999% (11 9's) durability
- Availability: 99.99% availability
D. Amazon RDS for PostgreSQL
- Relational database service, not designed for simple backup storage
- More expensive than S3 for storage
- Over-engineered for storing 300 MB of JSON backup data
- Not cost-effective for this use case
Why S3 Standard is the best choice:
- Cost: S3 Standard storage costs are very low (~
$0.023 per GB per month). For 300 MB, this is negligible. - Performance: Provides millisecond access to objects
- Simplicity: Simple to implement as a backup target
- Lifecycle policies: Can use S3 Lifecycle policies to automatically delete data after 30 days
- Durability: Extremely durable storage
Alternative consideration: For even more cost savings, S3 Standard-IA (Infrequent Access) could be considered, but given the small data volume and 30-day retention, S3 Standard is perfectly adequate and simpler.
Implementation approach:
- Store JSON files directly in S3
- Use S3 Lifecycle policy to automatically delete objects after 30 days
- The analytics application can write directly to S3 or use AWS Backup service
- Access is immediate when needed for disaster recovery
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