Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 66 discussion

i think C should be the answer here, > Immediate accessibility is always required as the files contain critical business data that is not easy to reproduce If they do not explicitly mention that they are using Glacier Instant Retrieval, we should assume that Glacier -> takes more time to retrieve and may not meet the requirements

Most COST EFFECTIVE A: S3 Glacier Instant Retrieval is a new storage class that delivers the fastest access to archive storage, with the same low latency and high-throughput performance as the S3 Standard and S3 Standard-IA storage classes. You can save up to 68 percent on storage costs as compared with using the S3 Standard-IA storage class when you use the S3 Glacier Instant Retrieval storage class and pay a low price to retrieve data.

S3 Glacier Instant Retrieval is more expensive than S3 Standard-IA for both storage and retrieval requests. S3 Standard-IA is 68% cheaper for storage than S3 Standard, while S3 Glacier Instant Retrieval is only 46% cheaper

Answer is A. Files are rarely accessed after 30 days and they require the MOST cost effective solution. Then the answer is Glacier.

If Glacier class is not specified, I could assume it is refering to S3 Glacier Flexible Retrieval (formerly S3 Glacier). Then, the retrieval of data is not immediate as requested. The best option would be glacier Instant Retrieval, but it's not specified... so the best answer that fits is C.

C is the answer. While both "S3 Standard-Infrequent Access" and "S3 One Zone-Infrequent Access" are storage classes on AWS S3 designed for data accessed infrequently, the key difference is that "S3 One Zone-IA" stores data in a single Availability Zone, making it cheaper but with a higher risk of data loss if that zone fails, whereas "S3 Standard-IA" spreads data across multiple Availability Zones for increased redundancy and availability; making it a better choice for critical data that needs to be readily accessible even if rarely accessed.

S3 IA is the most suitable here.

onezone IA is cheap more than standard IA

Option C is the most cost-effective solution because it provides immediate access for the first 30 days and optimizes for cost by transitioning the files to S3 Standard-IA after that period. It also complies with the company’s retention policy.

*Immediate accessibility*

It should be C. The critical point is Immediate accessibility, only S3-IA can provide this.

"Immediate accessibility is always required". It can't be a, since Glacier Instant Retrieval has a limit of times the data can be accessed. "S3 Glacier Retrieval is the lowest cost archive storage with milliseconds retrieval for rarely accessed data. It is ideal for data that is accessed once or twice per quarter, and that requires immediate access."

immidiately accessible for 4 years bur rarely use - S3 standard IA. Correct answer is C

Keep in mind that "Glacier Flexible Retrieval" was previously named just "Glacier" (before they added Instant Retrieval). Regardless, they should have made it clear which Glacier class they are referring to since which one you select/assume can impact the correctness.

I am going to go with B. Reasoning = A = even if Glacier Instant Retrieval was used here, you can only use that quick retrieval once a quarter which isn't what the prompt is asking for. B - One Zone is the cheapest option, and the prompt does not ask for high availability. C / D - see reasoning for B

S3 One Zone-Infrequent Access (S3 One Zone-IA) is cheaper than S3 Standard and S3 Standard-Infrequent Access (S3 Standard-IA) but still offers immediate accessibility. Since the files are rarely accessed after the first 30 days, transitioning them to S3 One Zone-IA after 30 days will reduce costs. The 4-year retention period aligns with the company policy, and after this period, the files can be deleted. Option C suggests moving the files from S3 Standard to S3 Standard-Infrequent Access (S3 Standard-IA) after 30 days, which is a more expensive storage class compared to S3 One Zone-Infrequent Access (S3 One Zone-IA). Since the files are rarely accessed after the first 30 days, moving them to S3 Standard-IA would result in higher storage costs compared to moving them to S3 One Zone-IA. Therefore, option B is more cost-effective than option C.

C is the correct answer