Amazon FSx can allows you to launch third-party high-performance File Systems (FS) on AWS in case EFS or S3 is not your choice. As of 2023, there are 3 offerings of FSx, they are FSx for Lustre, FSx for Windows File Sever, and FSx for NetApp ONTAP.
Amazon FSx for Windows File Sever
Amazon FSx for Windows File Sever is a fully managed, high reliable, and scalable Windows native shared file system. It is meant for Windows instances, it is integrated with Microsoft Active Directory for user security.
It supports SMB protocol and Windows NTFS, and can be accessed from AWS or your on-premise infrastructure.
Amazon FSx for Lustre
Amazon FSx for Lustre is a fully managed, high-performance, scalable file storage for High Performance Computing (HPC). The name Lustre is derived from “Linux” and “cluster”.
It allows to run different use cases for HPC including Machine Learning (ML), analytics, video processing, financial modeling.
Amazon FSx for Lustre can be scaled to extremely high traffic up to 100s GB/s, millions of IOPS (input/output per second), and sub-ms latencies.
Amazon FSx for Lustre stores your data into Amazon S3 buckets.
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Reference - Udemy Ultimate AWS Certified Cloud Practitioner CLF-C02