The access frequency of some data varies greatly over time, and its future access pattern cannot be predicted. Which S3 storage class is BEST suited to automatically move the data to the most cost-effective tier based on access without manual movement?
Selecting an S3 class that optimizes cost automatically when the access pattern is unknown.
S3 Standard - Infrequent Access (Standard-IA)
S3 Standard-IA is a class that stores data known to be accessed infrequently at a low cost, with a charge per retrieval.
For data with varying, unpredictable frequency like in this question, retrieval charges add up during periods of higher access, so Intelligent-Tiering, which moves tiers automatically, fits and this is incorrect.
S3 Glacier Deep Archive
Deep Archive is dedicated to long-term archiving and takes time to retrieve.
It is unsuited to data that varies in access frequency and is sometimes accessed often, and it does not match the requirement for automatic tier movement, so it is incorrect.
S3 Intelligent-Tiering
Correct. S3 Intelligent-Tiering monitors access and automatically moves objects between low-cost and fast-access tiers. It achieves cost optimization for data with unpredictable or varying access patterns without manual operation.
S3 One Zone-IA
One Zone-IA is a fixed class for infrequent access that stores data in a single AZ and has no feature to move tiers automatically.
It does not meet the requirement for automatic optimization based on the access pattern, so it is incorrect.
'Unpredictable or varying access pattern' and 'moves tiers automatically' point to S3 Intelligent-Tiering. When the access frequency is clear, choose Standard / Standard-IA / Glacier directly.