Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 22 discussion

"unpredictable pattern" - always go for Intelligent Tiering of S3 It also meets the resiliency requirement: "S3 Standard, S3 Intelligent-Tiering, S3 Standard-IA, S3 Glacier Instant Retrieval, S3 Glacier Flexible Retrieval, and S3 Glacier Deep Archive redundantly store objects on multiple devices across a minimum of three Availability Zones in an AWS Region" https://docs.aws.amazon.com/AmazonS3/latest/userguide/DataDurability.html

The storage option that meets these requirements is B: S3 Intelligent-Tiering. Amazon S3 Intelligent Tiering is a storage class that automatically moves data to the most cost-effective storage tier based on access patterns. It can store objects in two access tiers: the frequent access tier and the infrequent access tier. The frequent access tier is optimized for frequently accessed objects and is charged at the same rate as S3 Standard. The infrequent access tier is optimized for objects that are not accessed frequently and are charged at a lower rate than S3 Standard. S3 Intelligent Tiering is a good choice for storing media files that are accessed frequently and infrequently in an unpredictable pattern because it automatically moves data to the most cost-effective storage tier based on access patterns, minimizing storage and retrieval costs. It is also resilient to the loss of an Availability Zone because it stores objects in multiple Availability Zones within a region.

I am going to choose B. S3 Intelligent-Tiering - Perfect use case when you don't know the frequency of access or irregular patterns of usage.

Key phrase: Some files are accessed frequently while other files are rarely accessed in an unpredictable pattern. Always use S3 Intelligent-Tiering for unpredictable access patterns.

Ans B - Intelligent Tiering: cost effective, optimised by access frequency

S3 intelligent tiering support 3 layer, frequent access, infrequent access and rarely access data. https://docs.aws.amazon.com/AmazonS3/latest/userguide/intelligent-tiering-overview.html

Unpredictable pattern equals intelligent tiering

unpredictable pattern == S3 IA (Intellgent Tiering, not Infrequent access though)

Unpredictable pattern = Intelligent tiering

Answer-B

The right answer due to "unpredictable pattern"

B because intelligent tiering is what we choose when we don’t have a pattern

Amazon S3 Intelligent Tiering is a storage class that automatically moves data to the most cost-effective storage tier based on access patterns. It can store objects in two access tiers: the frequent access tier and the infrequent access tier. The frequent access tier is optimized for frequently accessed objects and is charged at the same rate as S3 Standard. The infrequent access tier is optimized for objects that are not accessed frequently and are charged at a lower rate than S3 Standard.

(B) The question mentions that some files are accessed frequently while others are rarely accessed, and the pattern is unpredictable. This makes S3 Intelligent-Tiering a good fit because it automatically moves data between different access tiers based on how frequently they are accessed, optimizing costs. Intelligent-Tiering is designed to optimize costs by automatically moving data to the most cost-effective access tier, without performance impact or operational overhead. B meets the requirements

Amazon S3 Intelligent Tiering is a storage class that automatically moves data to the most cost-effective storage tier based on access patterns.

Unpredictable pattern, intelligent tiering will handle that. B - is the answer..

Files are accessed in an unpredictable pattern, must minimize the costs of storing and retrieving the media files = S3 Intelligent-Tiering.