What should a solutions architect do to meet these requirements?
Create an Amazon S3 Standard bucket with access to the web servers.
Configure an Amazon CloudFront distribution with an Amazon S3 bucket as the origin.
Create an Amazon Elastic File System (Amazon EFS) file system. Mount the EFS file system on all web servers.
Configure a General Purpose SSD (gp3) Amazon Elastic Block Store (Amazon EBS) volume. Mount the EBS volume to all web servers.
Explanations:
While an Amazon S3 bucket can be used for file storage, it does not natively support file system semantics required by many applications that expect a file system interface. This would require changes to the application to interact with S3, which is not acceptable as per the requirements.
Configuring a CloudFront distribution with an S3 bucket as the origin is more suited for content delivery rather than direct file access by web servers. This setup also would require the application to change how it accesses files, which does not meet the requirement of no changes to the application.
Amazon EFS is a fully managed file system that can be mounted across multiple EC2 instances. It provides a file system interface and supports NFS, making it ideal for applications that require shared file access without modifying them. This solution meets all requirements.
An EBS volume is designed to be attached to a single EC2 instance at a time. While it could provide persistent storage, it does not allow for concurrent access by multiple web servers, which is a requirement for the application. Therefore, this option is not suitable.
I strategize that the answer is:
Create an Amazon Elastic File System (Amazon EFS) file system. Mount the EFS file system on all web servers.