Exam AWS Certified Cloud Practitioner CLF-C02 topic 1 question 201 discussion

B. S3 Glacier Flexible Retrieval - most cost-effective solution and standard retrievals can take up to 12 hours for retrieval, which suits the company's needs here.

S3 Glacier Flexible Retrieval: This storage class is designed for long-term archival of data that is infrequently accessed and where retrieval times of several hours are acceptable. It is the most cost-effective storage class for data that is retained for months, years, or decades. However, data retrieval times can range from a few minutes to several hours. S3 One Zone-Infrequent Access (S3 One Zone-IA): This storage class is designed for data that is infrequently accessed but requires rapid access when needed. It stores data in a single availability zone, which makes it less expensive than other S3 storage classes, but also less resilient to availability zone failures. Data retrieval is typically instantaneous. In the context of the question, if the company needs to access the data within 12 hours, both S3 Glacier Flexible Retrieval and S3 One Zone-IA could meet this requirement. However, S3 One Zone-IA would provide faster access times when the data is needed.

. S3 One Zone-Infrequent Access (S3 One Zone-IA)

S3 Glacier Flexible Retrieval. S3 One Zone-IA (Infrequent Access) costs $0.01/GB whereas S3 Glacier Flexible costs $0.0036/GB.

S3 Glacier Flexible Retrieval – Use for archives where portions of the data might need to be retrieved in minutes. Data stored in the S3 Glacier Flexible Retrieval storage class has a minimum storage duration period of 90 days and can be accessed in as little as 1-5 minutes by using an expedited retrieval. The retrieval time is flexible, and you can request free bulk retrievals in up to 5-12 hours. If you delete, overwrite, or transition the object to a different storage class before the 90-day minimum, you are charged for 90 days. Amazon S3 supports restore requests at a rate of up to 1,000 transactions per second, per AWS account for S3 Glacier Flexible Retrieval.

https://www.techtarget.com/searchstorage/tip/A-guide-to-AWS-storage-cost

B is cheaper than C

ChatGPT: S3 One Zone-Infrequent Access (S3 One Zone-IA) is a storage class within Amazon S3 that is designed for data that is infrequently accessed but still needs to be retrievable within 12 hours. It offers a lower storage cost compared to S3 Standard and is suitable for scenarios where data durability and availability in a single Availability Zone are acceptable. This makes it a cost-effective solution for storing data that is accessed less frequently but still needs to be accessible within a reasonable timeframe. Why not B? S3 Glacier Flexible Retrieval (option B) is not the most suitable option for the given scenario because it's designed for long-term archival storage with infrequent access. While it does offer a low storage cost, retrieving data from Glacier typically takes longer than 12 hours because Glacier is optimized for long-term storage at a lower cost with retrieval times ranging from minutes to hours, depending on the retrieval option chosen.

Cost-effective -> answer is C

The most suitable Amazon S3 storage class for the company's needs is: C. S3 One Zone-Infrequent Access (S3 One Zone-IA) Here's why: Cost-effectiveness: S3 One Zone-IA offers the lowest storage cost per gigabyte among the listed options, making it ideal for infrequently accessed data. 12-hour retrieval: Meets the company's retrieval time requirement of 12 hours, with an average retrieval time of 3.5 hours and a maximum of 12 hours. Availability: Stores data in a single Availability Zone, which reduces costs compared to multi-AZ options like S3 Standard-IA. However, remember that data in a single AZ is susceptible to complete loss if that AZ experiences an outage.

https://aws.amazon.com/s3/storage-classes/#:~:text=S3%20Glacier%20Flexible%20Retrieval%20(formerly%20S3%20Glacier)%2C%20with%20retrieval%20in%20minutes%20or%20free%20bulk%20retrievals%20in%205%E2%80%9412%20hours.%20To

S3Glacier Flexible Retrieval Bulk data retrievals and requests are free of charge.

B is correct Amazon S3 Glacier Flexible Retrieval (formerly Amazon S3 Glacier): • Expedited (1 to 5 minutes), Standard (3 to 5 hours), Bulk (5 to 12 hours) – free