Topic-Based – S3 (SA-Associate)

[ayanivas]

Category: CSAA – Design Cost-Optimized Architectures

A few easily reproducible files must be stored in AWS without concerns about storage capacity. During the first month, all files will be accessed frequently, but after that period, access will become infrequent. Older files will only be accessed by developers, and no specific retrieval time requirement is defined. However, files under a specific tdojo-finance prefix in the Amazon S3 bucket will be used for post-processing that requires millisecond retrieval time.

Given these conditions, which of the following options would be the most cost-effective solution for the storage requirements?….

For the above Question, correct answer is option below as per my knowledge :

• Store the files in S3, then after a month, change the storage class of the prefix to S3 Standard-Infrequent Access (Standard-IA) while the remaining go to Glacier using a lifecycle policy.

But in the test, correct answer is :

• Store the files in S3, then after a month, change the storage class of the prefix to S3 One Zone-Infrequent Access (One-Zone IA), while the remaining go to Glacier using a lifecycle policy.

I do not understand why One-Zone IA would be preferred,as it provides lower resiliency….we need multi-zone availability for files…..nothing specific mentioned on question to avoid multi-zone?

Kindly explain