Examkin

Question

Difficulty: HardAWS Storage Services

A biotechnology firm stores large, multi-gigabyte genomic sequence files on AWS. During the initial 3030 days of a research project, these files are accessed continuously. After this period, the access pattern becomes highly unpredictable; some files are accessed daily by global research teams, while others are not accessed at all for several months. The firm requires a storage solution that automatically minimizes costs based on changing access patterns, guarantees millisecond retrieval times for all data, and requires no manual analysis or lifecycle rules to manage. Which Amazon S3 storage class meets these requirements?

  1. A
    Amazon S3 Standard-Infrequent Access (S3 Standard-IA)
  2. Amazon S3 Intelligent-TieringAnswer
  3. C
    Amazon S3 Glacier Instant Retrieval
  4. D
    Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA)

Answer

Amazon S3 Intelligent-Tiering
Amazon S3 Intelligent-Tiering is the correct choice because it automatically optimizes storage costs by moving data between two access tiers (frequent and infrequent) based on changing access patterns. It does not charge retrieval fees and guarantees the same millisecond retrieval times as S3 Standard, eliminating the operational overhead of managing complex lifecycle rules for unpredictable workloads.

Step-by-Step Solution

1
Analyze the workload access patterns described in the scenario.
The access patterns are initially frequent for the first 3030 days but become highly unpredictable thereafter, with fluctuating retrieval rates.
Understanding the retrieval patterns is necessary to choose the correct storage tier.
2
Evaluate the storage class requirements and constraints.
The solution must automate cost optimization, have no retrieval fees, maintain millisecond retrieval times, and require no operational overhead.
These constraints rule out manual lifecycle policies and archive classes with high retrieval charges.
3
Compare candidate S3 storage classes against constraints.
Amazon S3 Intelligent-Tiering automatically handles unpredictable access without retrieval fees or latency penalties, while S3 Standard-IA, Glacier Instant Retrieval, and S3 One Zone-IA fail one or more criteria.
To determine the optimal cost-effective and low-overhead storage class.

Key Concept

Automatic cost optimization for unpredictable S3 access patterns
Rate this question

Topics

AWS Storage Services

More questions from this topic