Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 890 discussion

Although it's not stated what is meant by 'rarely accessed', this scenario would primarily be a candidate for the Glacier Instant Retrieval tier as the storage price would be more than 3 times lower compared to Standard IA. In the specific case of files being more frequently retrieved than quarterly, it can qualify for consideration of Standard IA. Actually, we don't have the required info, so we have to guess what they are thinking.. which is pretty lame, to be honest..

Glacier is much cheaper for storage than standard. The catch is you have to pay for 90 days of storage no matter what, even if the object is deleted. Here we will store data for 4 years so glacier is the cheapest solution.

A - S3 Glacier Instant Retrieval is designed for archival storage where objects are infrequently accessed but still require millisecond retrieval, so yes actually A will work. It's just that Glacier storage costs more than S3 Standard-IA (given that after 30 days, the files are only RARELY accessed), so this is not the most cost-effective option. B - For files that "cannot be recreated," durability is crucial, so single Availability Zone is not OK. C - S3 Standard-IA is optimized for objects accessed less frequently but still requires rapid retrieval and high durability. D - After 4 years, let's just delete those files.

Instant Retrieval = immediately accessible. Coose the S3 Glacier Instant Retrieval storage class when you need milliseconds access to low cost archive data. https://aws.amazon.com/s3/faqs/?nc=sn&loc=7

Glacier Instant Retrieval is much cheaper, and it is intended for archival storage with very low access patterns

While S3 Glacier Instant Retrieval offers immediate access, it has a minimum storage duration policy, Objects stored in S3 Glacier Instant Retrieval have a minimum storage duration of 90 days.

S3 Glacier Instant Retrieval delivers the fastest access to archive storage, with the same throughput and milliseconds access as the S3 Standard and S3 Standard-IA storage classes. --- https://aws.amazon.com/s3/storage-classes/glacier/instant-retrieval/

cost effective -> OneZone IA "The files must be immediately accessible" -> cannot be Glacier

this option has most durability

"are rarely accessed after the first 30 days" - not often I will go with "C".

https://aws.amazon.com/es/s3/storage-classes/glacier/instant-retrieval/

mmediately accessible =>C

AnswerC We cannot choose B because if that one zone will fail, company will not be able to recreate them. We cannot choose D because we do not have to store files after 4y hence we can delete them (cost savings) We cannot choose A - Glacier is less expensive (0,004 per GB) then S3-Standard - IA but is not allowing for instant access which is one of requirements (there is no information that data access shouldn't be accessible immedietly) we have only information that after 30d access to data is less frequently. Hence I think we need to choose S3 Standard - IA (answer C)

Requirements: - frequently accessed for 30 days - lower cost Features for S3 Standard-IA: - Infrequently accessed objects - Milliseconds to acces According to me, best option for this use case is C NB: Glacier better suits for lower cost, infrequent access.

why do we need one zone, glacier instant for 30 days ? or why do we need to move to glacier after 4 years ? I think C is correct

B. Create an S3 Lifecycle policy to move the files to S3 One Zone-Infrequent Access (S3 One Zone-IA) 30 days after object creation. Delete the files 4 years after object creation. This option leverages S3 One Zone-IA, which offers a lower cost compared to S3 Standard-IA, while ensuring that files are immediately accessible during the first 30 days of their creation. Then, after this period, the files are moved to S3 One Zone-IA for less frequent access storage, further reducing costs. Finally, the files are deleted after 4 years, meeting the requirement for long-term retention.