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Difficulty: MediumAWS Storage Services

A digital marketing firm is deploying a content management application on Amazon EC2 instances. The application has two specific storage requirements:

1. A shared file system that allows multiple EC2 instances to simultaneously read and write web assets.
2. A high-performance, temporary block storage volume for processing intermediate scratch data that does not need to persist beyond the lifecycle of the instance.

Which two AWS storage options should the developer select to meet these requirements?

  1. Amazon Elastic File System (Amazon EFS)Answer
  2. Amazon EC2 Instance StoreAnswer
  3. C
    Amazon Elastic Block Store (Amazon EBS)
  4. D
    Amazon S3 Glacier Deep Archive
  5. E
    AWS Storage Gateway

Answer

The correct options are Amazon Elastic File System (Amazon EFS) and Amazon EC2 Instance Store.
The system requires a shared file system for concurrent access, which is solved by Amazon Elastic File System (Amazon EFS). It also requires temporary, high-performance block storage, which is perfectly matched by Amazon EC2 Instance Store because the data is transient and tied to the instance's lifecycle.

Step-by-Step Solution

1
Identify the storage requirements from the scenario.
The scenario requires (1) a shared file system for concurrent read/write access by multiple EC2 instances, and (2) high-performance, temporary block storage that does not need to persist beyond the instance's lifecycle.
This breaks down the problem into two distinct AWS storage service decisions.
2
Evaluate the first requirement: a shared file system for multiple EC2 instances.
Amazon Elastic File System (Amazon EFS) is selected because it supports the Network File System (NFS) protocol and allows concurrent connections from multiple EC2 instances.
Amazon EBS is block storage meant for single instances (with rare exceptions), and S3 is object storage accessed via APIs, not a standard mountable file system.
3
Evaluate the second requirement: high-performance, temporary block storage that is bound to the instance lifecycle.
Amazon EC2 Instance Store is selected because it is physically attached to the host server, offering high performance for temporary data (scratch pad, cache) that is lost if the instance stops or terminates.
Amazon EBS provides persistent block storage, which would continue to exist (and incur costs) unless explicitly deleted, whereas Instance Store matches the 'temporary' requirement perfectly and offers lower latency.

Key Concept

Selecting appropriate AWS storage services (EFS for shared file systems, Instance Store for temporary high-performance block storage) based on application requirements.
Estimated Time:1m 30s
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Topics

AWS Storage Services

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