AWS Certified Solutions Architect – Associate (SAA-C03) — Question 497

A company seeks a storage solution for its application. The solution must be highly available and scalable. The solution also must function as a file system be mountable by multiple Linux instances in AWS and on premises through native protocols, and have no minimum size requirements. The company has set up a Site-to-Site VPN for access from its on-premises network to its VPC.

Which storage solution meets these requirements?

Answer options

• A. Amazon FSx Multi-AZ deployments
• B. Amazon Elastic Block Store (Amazon EBS) Multi-Attach volumes
• C. Amazon Elastic File System (Amazon EFS) with multiple mount targets
• D. Amazon Elastic File System (Amazon EFS) with a single mount target and multiple access points

Correct answer: C

Explanation

Amazon Elastic File System (Amazon EFS) is a highly available and scalable file system that natively supports the NFSv4 protocol for Linux and has no minimum size requirements, allowing concurrent mounting from both AWS and on-premises systems via a VPN using multiple mount targets. In contrast, Amazon EBS Multi-Attach does not function as a native shared network file system and cannot be mounted on-premises, while Amazon FSx has minimum storage capacity requirements. Using a single EFS mount target would fail to provide the high availability across multiple Availability Zones required by the organization.