A company has a fleet of Amazon EC2 instances running Linux across multiple Availability Zones. The instances need to access a shared file system simultaneously to read and write configuration files. Which storage solution meets this requirement?

Answer options:

Amazon EBS with Multi-Attach

Amazon EFS

Amazon S3

Amazon FSx for Windows File Server

How to approach this question

Linux + Shared File System + Multi-AZ = Amazon EFS.

Full Answer

B.Amazon EFS✓ Correct

Amazon EFS

Amazon Elastic File System (Amazon EFS) provides a simple, scalable, fully managed elastic NFS file system for use with AWS Cloud services and on-premises resources. It is built to scale on demand to petabytes without disrupting applications and can be accessed concurrently by thousands of EC2 instances across multiple AZs.

Common mistakes

Choosing EBS Multi-Attach, which is restricted to a single AZ.

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