AWS Certified Solutions Architect – Professional — Question 845

A company is planning to migrate an application from on premises to the AWS Cloud. The company will begin the migration by moving the application's underlying data storage to AWS. The application data is stored on a shared file system on premises, and the application servers connect to the shared file system through
SMB.
A solutions architect must implement a solution that uses an Amazon S3 bucket for shared storage. Until the application is fully migrated and code is rewritten to use native Amazon S3 APIs, the application must continue to have access to the data through SMB. The solutions architect must migrate the application data to
AWS to its new location while still allowing the on-premises application to access the data.
Which solution will meet these requirements?

Answer options

• A. Create a new Amazon FSx for Windows File Server file system. Configure AWS DataSync with one location for the on-premises file share and one location for the new Amazon FSx file system. Create a new DataSync task to copy the data from the on-premises file share location to the Amazon FSx file system.
• B. Create an S3 bucket for the application. Copy the data from the on-premises storage to the S3 bucket.
• C. Deploy an AWS Server Migration Service (AWS SMS) VM to the on-premises environment. Use AWS SMS to migrate the file storage server from on premises to an Amazon EC2 instance.
• D. Create an S3 bucket for the application. Deploy a new AWS Storage Gateway file gateway on an on-premises VM. Create a new file share that stores data in the S3 bucket and is associated with the file gateway. Copy the data from the on-premises storage to the new file gateway endpoint.

Correct answer: D

Explanation

AWS Storage Gateway (specifically S3 File Gateway) allows on-premises applications to seamlessly store and retrieve objects in Amazon S3 using standard file protocols like SMB. This fulfills the requirement of retaining SMB access for the legacy application while storing the underlying data directly in an S3 bucket. Other solutions like Amazon FSx do not store the data in an S3 bucket, and direct S3 copies do not provide the required local SMB interface.