Amazon FSx for NetApp ONTAP provides shared storage between Linux and Windows file systems.

This solution satisfies the needs in the following ways: • Amazon EC2 provides a seamless migration path for the existing server-based applications without code changes. The simulation app can run on Linux EC2 instances and the visualization app on Windows EC2 instances. • Amazon FSx for NetApp ONTAP provides highly performant file storage that is accessible via both NFS and SMB. This allows the simulation app to write to NFS shares as currently designed, and the visualization app to access the same data via SMB. • FSx for NetApp ONTAP ensures the data is synchronized and up to date across the file systems. This addresses the data duplication issues of the current setup. • Resources can be scaled efficiently since EC2 and FSx provide scalable compute and storage on demand.

It is D but I think NetApp ONTAP is an oversell in this context. They just needed a FSx solution not a whole expensive managed service... ABC are a lot of change to the code so D is the only choice here anyway

Amazon FSx for NetApp ONTAP Fully managed service offering shared storage between Linux and Windows file systems (Multi & Single-AZ) up to petabytes datasets and 10+Gbps. - Allows Multi-protocol access to data using the (NFS), Server Message Block (SMB), and Internet Small Computer Systems Interface (iSCSI) protocols - Integrated with other AWS services (KMS, IAM, CloudTrail, amazon workspace) - ideal solution to migrate, back up, or burst your file-based applications from on-prem to AWS without application code change.

A would require code changes B might also require code changes, and "FSx File Gateway" provides SMB access (not NFS) C uses SQS which has no place here D can provide same storage via SMB and NFS

https://docs.aws.amazon.com/fsx/latest/ONTAPGuide/what-is-fsx-ontap.html

One of the use cases for Amazon FSx for NetApp ONTAP is when you need to move workloads running on NetApp or other NFS/SMB/iSCSI servers to AWS without modifying application code or how you manage data.

The key requirements are: Simulation app runs on Linux, outputs data to NFS Visualization app runs on Windows, requires SMB file system Migrate apps to AWS without code changes Eliminate data duplication and inefficient resource usage

For shared storage between Linux and windows you need to implement Amazon FSx for NetApp ONTAP

windows => FSX we didn't mention containers => can't be ECS

Amazon FSx for NetApp ONTAP is a fully managed service that provides shared file storage built on NetApp’s popular ONTAP file system. It supports NFS, SMB, and iSCSI protocols2 and also allows multi-protocol access to the same data

Amazon FSx for NetApp ONTAP is a fully-managed shared storage service built on NetApp’s popular ONTAP file system. Amazon FSx for NetApp ONTAP provides the popular features, performance, and APIs of ONTAP file systems with the agility, scalability, and simplicity of a fully managed AWS service, making it easier for customers to migrate on-premises applications that rely on NAS appliances to AWS. FSx for ONTAP file systems are similar to on-premises NetApp clusters. Within each file system that you create, you also create one or more storage virtual machines (SVMs). These are isolated file servers each with their own endpoints for NFS, SMB, and management access, as well as authentication (for both administration and end-user data access). In turn, each SVM has one or more volumes which store your data. https://aws.amazon.com/de/blogs/storage/getting-started-cloud-file-storage-with-amazon-fsx-for-netapp-ontap-using-netapp-management-tools/

B is correct I believe

Answer is D