Question

Difficulty: EasyAWS Storage Services

A company is setting up a temporary data processing workload on Amazon EC2. The application requires two types of storage: a cost-effective, durable storage option to archive final reports that are rarely accessed, and a high-performance, temporary scratch space directly attached to the instance that does not need to persist after the instance is stopped.

Which two AWS storage options should the company select to meet these requirements? (Select TWO.)

  1. Amazon S3 Glacier Flexible RetrievalAnswer
  2. Amazon EC2 Instance StoreAnswer
  3. C
    Amazon Elastic File System (Amazon EFS)
  4. D
    Amazon Elastic Block Store (Amazon EBS) Provisioned IOPS SSD
  5. E
    AWS Storage Gateway

Answer

Amazon S3 Glacier Flexible Retrieval and Amazon EC2 Instance Store
Amazon S3 Glacier Flexible Retrieval provides highly durable, low-cost archiving for data that is rarely accessed, satisfying the first requirement. Amazon EC2 Instance Store provides ephemeral, high-performance block storage directly attached to the host, satisfying the second requirement for scratch space that does not need to persist beyond the lifecycle of the instance.

Step-by-Step Solution

1
Analyze the first requirement: cost-effective, durable storage to archive final reports that are rarely accessed.
Identify Amazon S3 Glacier Flexible Retrieval as the optimal service designed specifically for secure, durable, low-cost archiving of infrequently accessed data.
S3 Glacier classes are tailored for archival workloads with retrieval times ranging from minutes to hours at a fraction of standard storage costs.
2
Analyze the second requirement: high-performance, temporary scratch space directly attached to an EC2 instance that does not need to persist after instance shutdown.
Identify Amazon EC2 Instance Store as the service providing high-performance, temporary block storage that lives and dies with the host instance.
Instance store is physically attached to the host computer, offering low latency and high I/O, but is ephemeral, meaning its data is lost if the instance is stopped or terminated.

Key Concept

Selecting appropriate AWS storage classes and types (archival object storage vs. ephemeral instance block storage) based on cost, durability, and lifecycle requirements.
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