Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 387 discussion

For all those, who are saying B as an option, read this phrase "Files contain critical business data that is not easy to reproduce"......so how can the choice be B. Its clearly C as we require Immediate retrieval.

C to me...

Answer is A : The Amazon S3 Glacier storage classes provide retrieval options from milliseconds to hours to fit your performance needs. The S3 Glacier Instant Retrieval storage class delivers milliseconds retrieval for archives that need immediate access, such as medical images or news media assets. S3 Glacier Flexible Retrieval provides three retrieval options: expedited retrievals that typically complete in 1–5 minutes, standard retrievals that typically complete in 3–5 hours and start within minutes when initiated using S3 Batch Operations, and free bulk retrievals that return large amounts of data typically in 5–12 hours. The Amazon S3 Glacier Deep Archive storage class provides two retrieval options ranging from 12-48 hours. https://aws.amazon.com/s3/storage-classes/glacier/

Immediate accessibility is always required That Mean > "A/D" Out , More Than 5 min up to 5h + storage solution is MOST cost-effective > "C" Out , He didn't Talk About HA or Anything Else (S3 One Zone-IA) Is The CHEAPEST Ans ="B"

Glacier does not give immediate response. So answer C is better.

no one considered the MOST cost effective in the question. Isn't S3 Standard-Infrequent more expensive that S3 One Zone-Infrequent Access?

Amazon S3 Glacier Instant Retrieval is an archive storage class that delivers the lowest-cost storage for long-lived data that is rarely accessed and requires retrieval in milliseconds. With S3 Glacier Instant Retrieval, you can save up to 68% on storage costs compared to using the S3 Standard-Infrequent Access (S3 Standard-IA) storage class, when your data is accessed once per quarter. 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. S3 Glacier Instant Retrieval is designed for 99.999999999% (11 nines) of data durability and 99.9% availability by redundantly storing data across multiple physically separated AWS Availability Zones. It is designed for rarely accessed data that still needs immediate access in performance-sensitive use cases like image hosting, online file-sharing applications, medical imaging and health records, news media assets, and genomics.

C is the right answer. File has to be in s3 standard for first 30days. Then it has to move to infrequent access s3(S3-standard-IA) because user wants immediate access. Glacier can be good option if user can wait at-least a minute. So answer is C.

Glacier Instant Access will have a millisecond delay only

"the files contain vital business data that is difficult to replicate" one zone is not safe.

"Files contain critical business data that is not easy to reproduce" => C

The data must "live" for 4 years. So you have to accomplish that. I go with C.

I think this is an old question before S3 glacier instant retrival was introduced so we would go with C but in my opinion if you get this question now A is the more logical answer. Amazon S3 Glacier Instant Retrieval is an archive storage class that delivers the lowest-cost storage for long-lived data that is rarely accessed and requires retrieval in milliseconds. With S3 Glacier Instant Retrieval, you can save up to 68% on storage costs compared to using the S3 Standard-Infrequent Access (S3 Standard-IA) storage class, when your data is accessed once per quarter. Ans:A

Vital businesses files meaning critical files.

the files contain vital business data that is difficult to replicate. >> One-zone IA is not suitable.

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.

Requirement is MOST-CHEAPEST So, One-Zone-IA is correct.