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AWS Server Migration Service
User Guide

What Is AWS SMS?

AWS Server Migration Service automates the migration of your on-premises VMware server fleet to the AWS Cloud. AWS SMS incrementally replicates your server VMs as cloud-hosted Amazon Machine Images (AMIs) ready for deployment on Amazon EC2. Working with AMIs, you can easily test and update your cloud-based images before deploying them in production.

By using AWS SMS to manage your server migrations, you can:

  • Simplify the cloud migration process. You can begin migrating a group of servers with just a few clicks in the AWS Management Console. After the migration has initiated, AWS SMS manages all the complexities of the migration process, including automatically replicating volumes of live servers to AWS and creating new AMIs periodically. You can quickly launch EC2 instances from AMIs in the console.

  • Orchestrate multi-server migrations. AWS SMS orchestrates server migrations by allowing you to schedule replications and track progress for a group of servers. You can schedule initial replications, configure replication intervals, and track progress for each server using the console.

  • Test server migrations incrementally: With support for incremental replication, AWS SMS allows fast, scalable testing of migrated servers. Because AWS SMS replicates incremental changes to your on-premises servers and transfers only the delta to the cloud, you can test small changes iteratively and save on network bandwidth.

  • Support the most widely used operating systems. AWS SMS supports the replication of operating system images containing Windows, as well as several major Linux distributions.

  • Minimize downtime. Incremental AWS SMS replication minimizes the business impact associated with application downtime during the final cutover.

Use of AWS SMS is limited as follows:

  • 50 concurrent VM migrations per account

  • 90 days of service usage per VM (not per account), beginning with the initial replication of a VM. We terminate an ongoing replication after 90 days unless a customer requests a limit increase.