With Amazon FSx, you can choose between four widely used file systems:

It is a fully managed file storage service that helps you to move data residing in on-premises ZFS or other Linux-based file servers to AWS without changing your application code or how you manage data. With FSx for OpenZFS, you no longer have to worry about setting up and provisioning files servers and storage volumes. You also don't have to deal with replicating data, installing and patching file server software, detecting and addressing hardware failures, or manually performing backups.

FSx for OpenZFS delivers leading performance for latency-sensitive and small-file workloads with popular NAS data management capabilities (snapshots, and cloning), at a lower price than commercially licensed alternatives.

Amazon FSx for Windows File Server 

provides fully managed, highly reliable and scalable Microsoft Windows file servers, backed by a fully native Windows file system. FSx for Windows File Server provides file storage that is accessible over the Service Message Block (SMB) protocol and has the ability to serve as a drop-in replacement for existing Windows file server deployments. 

As a fully managed service, FSx for Windows File Server removes the administrative tasks of setting up and provisioning file servers and storage volumes and provides ease of use for customers building and running Windows applications.

Amazon FSx for Lustre

The open-source Lustre file system is designed for applications that require fast storage, where you want your storage to keep up with your compute. Amazon FSx for Lustre makes it convenient and cost effective to launch, run, and scale the popular high-performance file system. You can link FSx for Lustre file systems to data repositories on Amazon Simple Storage Service (Amazon S3) or to on-premises data stores.

FSx for Lustre delivers the highest levels of throughput (up to 1+ TB/s) and IOPS (millions). Customers can seamlessly integrate, access, and process their Amazon S3 datasets using the Lustre high-performance file system.