Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 48 discussion

keyword is "durable" location A and B is ephemeral storage C takes forever so is not HA, that leaves D

Elasticache is in Memory, EFS is for durability

Ans D - the clue is its the only option that offers "durable" (Not sure why the author suggests A??)

Durability is the key differentiator

If they are in instance store now, would EFS maintain the performance necessary for them? I don't think the performance would be similar.

The Elasticache option solves both storage and availability issues.

Cache is not Durable

D would be correct why would it give me A. :/

A and B are distractors. D is durable and HA.

durable location

Option C, which suggests moving the catalog to Amazon S3 Glacier Deep Archive, is not a suitable choice for an active catalog that requires high availability and quick access. Glacier Deep Archive is designed for long-term archival and may not provide the low-latency access required for a catalog used in a website. Therefore, option D is the most appropriate choice for achieving both high availability and durability for the catalog.

SEE https://aws.amazon.com/elasticache/faqs/#Redis

Redis an be made durable, supports failover and multi-AZ deployment, it's effective in catalog use cases. EFS is effective when a shared storage is needed

A and D, who win?

EC for Redis: Durability is a consideration, but the primary use case is caching EFS: Durability is a core feature for file-based data

Amazon EFS (Option D) provides the necessary combination of high availability, durability. See question states that high availabilty with durable location

Everyone else pretty much covered it but yes the answer is D. EFS- Securely and reliably access your files with a fully managed file system designed for 99.999999999 percent (11 9s) durability and up to 99.99 percent (4 9s) of availability