Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 160 discussion

Ans C: Cost-effective solution with milliseconds of retrieval -> it should be s3 standard

also s3 can store any form of data

Only Glacier class that would meet the requirement is Instant Retrieval, but it has 90 days minimum storage time which would kill the cost savings.

300 MB / month storage without retrieval when file is single 300 MB file: S3 Standard cost (Monthly): 0.01 USD S3 Standard cost (Upfront): 0.00 USD S3 Glacier Instant Retrieval cost (Monthly): 0.00 USD if it was 3GB: 3 GB / month storage without retrieval when file is single 3GB file: S3 Standard cost (Monthly): 0.07 USD S3 Standard cost (Upfront): 0.00 USD S3 Glacier Instant Retrieval cost (Monthly): 0.01 USD When assumed no retrieval is required because it's DR solution, and it's a single file, Glacier Instant Retrieval wins, and when they mention S3 glacier we must choose one of the sub-category

Answer is not B because S3 glacier and S3 glacier instant storage are two different types of storage class. So, answer here is C: S3 standard

Data must be accessible in milliseconds and must be kept for 30 days = Amazon S3 Standard

ANS - C

The reasons are: S3 Standard provides high durability and availability for storage It allows millisecond access to retrieve objects Objects can be stored for any duration, meeting the 30 day retention need Storage costs are low, around $0.023 per GB/month OpenSearch and RDS require running and managing a cluster for DR storage Glacier has lower cost but retrieval time is too high at 3-5 hours S3 Standard's simplicity, high speed access, and low cost make it optimal for this small DR dataset that needs to be accessed quickly

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

S3 Standard is a highly durable and scalable storage option suitable for backup and disaster recovery purposes. It offers millisecond access to data when needed and provides durability guarantees. It is also cost-effective compared to other storage options like OpenSearch Service, S3 Glacier, and RDS for PostgreSQL, which may have higher costs or longer access times for retrieving the data. A. OpenSearch Service (Elasticsearch Service): While it offers fast data retrieval, it may incur higher costs compared to storing data directly in S3, especially considering the amount of data being generated. B. S3 Glacier: While it provides long-term archival storage at a lower cost, it does not meet the requirement of immediate access in milliseconds. Retrieving data from Glacier typically takes several hours. D. RDS for PostgreSQL: While it can be used for data storage, it may be overkill and more expensive for a backup and disaster recovery solution compared to S3 Standard, which is more suitable and cost-effective for storing and retrieving data.

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

A. Incorrect Amazon OpenSearch Service (Amazon Elasticsearch Service) is designed for full-text search and analytics, but it may not be the most cost-effective solution for this use case B. Incorrect S3 Glacier is a cold storage solution that is designed for long-term data retention and infrequent access. C. Correct S3 standard is cost-effective and meets the requirement. S3 Standard allows for data retention for a specific number of days. D. PostgreSQL is a relational database service and may not be the most cost-effective solution.

Selected Answer: B S3 Glacier Instant Retrieval – Use for archiving data that is rarely accessed and requires milliseconds retrieval. https://docs.aws.amazon.com/amazonglacier/latest/dev/introduction.html

Option C

JSON is object notation. S3 stores objects.

c IS correct

C is correct