Question

A company is migrating a large on-premises fleet of Linux application servers and a self-managed PostgreSQL database to AWS within a fixed 4-month deadline. The application code cannot be modified during this migration window due to a vendor support contract, but the team wants to reduce operational overhead where possible without touching application code. The database currently runs on community PostgreSQL with no proprietary features. Which combination of migration strategies (7 Rs) best fits these constraints?

Accepted Answer

Rehost the application servers with AWS Application Migration Service (MGN) and replatform the database to Amazon RDS for PostgreSQL using AWS DMS.

Answer

Refactor the application into containers on Amazon ECS and re-architect the database into Amazon DynamoDB using DMS.

Answer

Rehost both the application servers and the database onto EC2 instances using MGN block-level replication for everything.

Answer

Replatform the application servers to AWS Elastic Beanstalk and repurchase the database as an Amazon Aurora Serverless offering.