A company needs to retain archive data for 10 years for compliance, but the data is rarely retrieved, and wants to store it in S3 at the lowest possible cost. Retrieval taking several hours is acceptable. Which S3 storage class is the MOST suitable?
A question asking which S3 storage class is cheapest for long-term retention.
S3 Glacier Deep Archive
This is correct. S3 Glacier Deep Archive is the lowest-cost storage class for long-term archives that are rarely accessed. Retrieval takes several hours, but in return the storage cost is the lowest, making it ideal for long-term retention such as compliance.
S3 Standard
S3 Standard is for frequently accessed data; retrieval is fast but the storage unit price is higher.
For the requirement to retain rarely retrieved data long-term at the lowest cost, it is not cost-suitable, so it is incorrect.
S3 Standard-IA (infrequent access)
Standard-IA is for infrequent access and cheaper than Standard, but not as cheap as Deep Archive, which is dedicated to long-term archives.
For a requirement that rarely retrieves and seeks the lowest cost, the cheaper Deep Archive is more suitable, so this is incorrect.
S3 Intelligent-Tiering
Intelligent-Tiering is a class that automatically moves data between tiers when the access pattern is unpredictable.
In this question, where access is known to be almost none and the lowest cost is sought, explicitly choosing Deep Archive is more appropriate, so this is incorrect.
"Rarely retrieved," "cheapest," and "retrieval time is OK" mean S3 Glacier Deep Archive. Frequent access is Standard, infrequent is Standard-IA, and unknown patterns are Intelligent-Tiering.