AWS Application Migration Service

A service that helps migrate on-premises, virtualized, or cloud-based servers to AWS by continuously replicating source system block-level data to a staging area in AWS and orchestrating test and cutover launches. It operates using a lightweight replication agent on source servers and AWS-side replication infrastructure to create target Amazon EC2 instances. It typically fits into lift-and-shift migration workflows where source machines are converted and launched in AWS for validation and cutover.

🗂 Resource Category

Migration and Transfer • Management and Governance

🧠 Exam Memory Hook

Think: "Lift-and-shift + agent replication to AWS EC2 + orchestration = AWS Application Migration Service"

📖 Ownership

Classification: Shared Responsibility Service

AWS responsibilities: AWS operates and maintains the service control plane, API endpoints, and the underlying AWS infrastructure that hosts the service; AWS also manages and patches AWS-owned physical infrastructure and the managed service platform that provides orchestration and management functionality.

Customer responsibilities: The customer deploys and configures the replication agent on source servers, provisions and configures the AWS staging environment (VPC, subnets, security groups, IAM roles), monitors replication, performs test launches and cutovers, and is responsible for securing and managing their source and target guest operating systems, applications, data, and credentials.

Patching responsibilities: AWS patches AWS-owned physical infrastructure and the managed service control plane and runtime. AWS patches the hypervisor layer for Amazon EC2. The customer patches guest operating systems, installed runtimes, application libraries, dependencies, and customer-deployed applications on source machines and on any EC2 instances created in their account for staging or target workloads; depending on deployment details, if replication servers are deployed as EC2 instances in the customer's account, the customer is responsible for their guest OS patching.

🏗 Typical Architecture

💡 Top 5 Features

Continuous, block-level replication from source servers to a staging area in AWS.
Agent-based replication that captures ongoing changes from source machines.
Orchestration of test launches and final cutover to create Amazon EC2 target instances.
Automated conversion of source server configuration into a launch configuration for AWS.
Ability to perform non-disruptive test launches in an isolated staging environment in the customer VPC.

✅ Top 5 Use Cases

Lift-and-shift datacenter migrations where servers are moved to Amazon EC2 with minimal replatforming.
Preparing a cloud-based disaster recovery staging environment by continuously replicating production servers to AWS for failover testing.
Migrating virtualized workloads from VMware or Hyper-V environments to AWS as Amazon EC2 instances.
Performing staged migrations with test launches to validate applications in AWS before final cutover.
Consolidating geographically distributed servers into AWS as part of data center exit planning.

🏗 Architecture Placement

AWS Application Migration Service sits between source environments (on-premises or other clouds) and the AWS target environment; source machines push block-level data to a staging area inside the customer's AWS account (VPC) where replication servers and storage hold replicated data, and the service control plane orchestrates test launches and final cutover to Amazon EC2. It is an account- and region-scoped migration service that requires IAM, VPC networking, and monitoring integrations. Requests originate from replication agents on source servers and from the AWS management console or APIs to control orchestration and launches.

🎯 Commonly Used With

- Amazon EC2
- AWS Migration Hub
- Amazon VPC
- AWS Identity and Access Management
- Amazon CloudWatch

🌍 5 Real-World Examples

A bank replicates core banking VM images to a staging VPC and performs test launches to validate behavior before migrating production to Amazon EC2, reducing migration risk.
A healthcare provider migrates electronic health record application servers to AWS using agent-based replication and test cutovers to validate integrations before final cutover.
A retail company moves seasonal storefront and inventory application servers from a leased datacenter into AWS EC2 to centralize operations and simplify management during a migration wave.
A media post-production firm migrates render farm VMs to AWS for consolidation and runs test launches to verify licensing and performance before cutover.
A government agency replicates legacy application servers into a secured VPC for assessment and staged migration to Amazon EC2 as part of a datacenter retirement program.

🎓 AWS Exam Clues

Agent-based continuous block-level replication for lift-and-shift migrations is a primary indicator to consider this service.
If a question requires test launches in a staging VPC and orchestration of cutover to EC2, this service is commonly applicable.
When migration tasks require converting existing server configurations into EC2 launch settings with minimal replatforming, consider this service.
Expect exam scenarios that mention IAM roles, VPC staging networks, and monitoring replication status as part of migration responsibilities.
If the requirement emphasises minimal downtime with repeated replication and controlled cutover, this service is relevant.

📝 Quick Revision

A lift-and-shift migration service that uses an agent to replicate block-level data to a staging area in AWS and orchestrates test and final launches to Amazon EC2. Use when you need agent-based continuous replication, test cutovers, and conversion to EC2; consider network bandwidth, IAM and VPC design, and testing/cutover windows in production planning.

🏷 Keywords

agent-based replication • block-level replication • staging area • replication server • test launch • cutover orchestration • launch configuration • lift-and-shift • migration wave • VPC staging • continuous replication • migration validation