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Difficulty: MediumAWS Storage Services

A company is deploying a fleet of virtual desktops on AWS using Linux-based Amazon EC2 instances. The company needs to provide a shared home directory for all users, allowing their personal configurations and files to be accessible from any of the desktop instances concurrently. The storage solution must support standard file-level permissions and automatically adjust its capacity as files are added or deleted. Which AWS storage service best meets these requirements?

  1. A
    Amazon Elastic Block Store (Amazon EBS)
  2. Amazon Elastic File System (Amazon EFS)Answer
  3. C
    Amazon Simple Storage Service (Amazon S3)
  4. D
    Amazon EC2 Instance Store

Answer

Amazon Elastic File System (Amazon EFS)
Amazon Elastic File System (Amazon EFS) is designed to provide serverless, fully managed file storage that can be mounted concurrently by multiple EC2 instances across different Availability Zones using the NFS protocol. It automatically grows and shrinks as files are added or removed, and supports POSIX permissions, making it ideal for shared directories like user home profiles.

Step-by-Step Solution

1
Identify the storage requirements from the scenario: a shared filesystem that supports concurrent access by multiple Linux EC2 instances, standard file-level permissions, and automatic scaling.
Determined that the solution must be a shared file system rather than block or object storage.
Home directories require standard directory hierarchies and POSIX permissions accessible by multiple hosts simultaneously.
2
Evaluate the available AWS storage options against these requirements.
Amazon EFS fits all criteria (NFS protocol support, multi-instance concurrent access, auto-scaling, POSIX compliance). Amazon EBS, Amazon S3, and Amazon EC2 Instance Store fail on one or more of these requirements.
Understanding the core differences between block, file, and object storage is key to selecting the correct AWS service.

Key Concept

AWS Shared File Storage (Amazon EFS)
Estimated Time:1m 0s
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Topics

AWS Storage Services

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