AWS Certified Solutions Architect Associate SAA-C03 Practice Question
A company must retain 1 TB of log files for at least one year to meet compliance requirements. The files are rarely accessed (typically less than once per month) but, when needed, must be retrievable within milliseconds. Which Amazon S3 storage class will provide the lowest ongoing storage cost while meeting these access-time and retention requirements?
S3 Standard-IA is designed for long-lived data that is accessed infrequently (once a month or less) and still needs millisecond retrieval. Its per-GB storage price is lower than S3 Standard, and it meets the performance requirement. S3 Glacier Flexible Retrieval and deeper archive classes have lower storage prices, but they do not meet the millisecond retrieval requirement without a restore process that takes minutes to hours. S3 Intelligent-Tiering's Frequent-Access tier has similar cost to S3 Standard until objects transition, so it is not the lowest ongoing cost for a known infrequent-access workload. Therefore, S3 Standard-IA is the most cost-effective choice in this scenario.
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