A company has a legacy application that requires a POSIX-compliant file system. The application runs on multiple Amazon EC2 Linux instances across multiple Availability Zones. All instances must have concurrent read and write access to the same file system. <br/><br/>Which storage solution should be used?

Answer options:

Amazon Elastic Block Store (Amazon EBS) with Multi-Attach

Amazon S3

Amazon Elastic File System (Amazon EFS)

Amazon FSx for Windows File Server

How to approach this question

Match 'POSIX-compliant', 'Linux', and 'concurrent access across AZs' to Amazon EFS.

Full Answer

C.Amazon Elastic File System (Amazon EFS)✓ Correct

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, growing and shrinking automatically as you add and remove files.

Common mistakes

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

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