Exams / SAA-C03 / S3 storage classes and lifecycle / Question 1
SAA-C03 practice question: S3 storage classes and lifecycle (1 of 3)
Design Cost-Optimized Architectures A free question from our original SAA-C03 practice exam. Try it, then open the answer to see why each option is right or wrong.
A company stores application logs in Amazon S3, at about 5 MB per object. Engineers read logs many times a day for the first 30 days. From day 30 to day 90, logs are read a few times a month and must still open in milliseconds. After 90 days, logs are almost never read, and a retrieval time of up to 48 hours is acceptable. Logs must be deleted after 7 years. Which solution is the MOST cost-effective?
Choose one answer.
- AA. Add a lifecycle rule that moves logs to S3 Standard-IA after 30 days and to S3 Glacier Deep Archive after 90 days, and expires them after 7 years.
- BB. Add a lifecycle rule that moves logs to S3 Standard-IA after 30 days and to S3 Glacier Flexible Retrieval after 90 days, and expires them after 7 years.
- CC. Add a lifecycle rule that moves logs to S3 Glacier Flexible Retrieval after 30 days and to S3 Glacier Deep Archive after 90 days, and expires them after 7 years.
- DD. Upload logs to S3 Intelligent-Tiering with the Deep Archive Access tier activated, and add a lifecycle rule that expires them after 7 years.
Show the answer and explanation
Answer: A
Explanation
When the access pattern is known, S3 Lifecycle rules move each object to the cheapest class that still meets its access needs. Standard-IA covers days 30 to 90 with millisecond reads; Glacier Deep Archive covers the long tail because 48-hour retrieval is acceptable; and an expiration action deletes logs at 7 years. Intelligent-Tiering's monitoring fee pays off only when the pattern is unpredictable.
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