A municipal transit authority plans to migrate its legacy on-premises customer ticketing d… — AWS Certified Cloud Practitioner

A municipal transit authority plans to migrate its legacy on-premises customer ticketing database to the AWS Cloud. The database currently runs on a self-managed PostgreSQL engine. To reduce operational overhead associated with patching, backups, and operating system maintenance without altering the application code or schema, the authority decides to migrate the database to Amazon Relational Database Service (Amazon RDS) for PostgreSQL. Which migration strategy is this organization employing?

ReplatformingAnswer
B
Rehosting
C
Refactoring
D
Repurchasing

Answer

Replatforming

Replatforming is the correct migration strategy because it involves taking an existing application and moving it to the cloud while introducing some level of optimization, such as using a managed service like Amazon RDS, without modifying the underlying application architecture.

Step-by-Step Solution

Analyze the migration scenario details.

The transit authority is migrating an existing PostgreSQL database to Amazon RDS for PostgreSQL to reduce management tasks while keeping application code and database schema unchanged.

This establishes that the core code is not being rewritten (eliminating refactoring) and the software is not being replaced by a third-party SaaS solution (eliminating repurchasing).

Compare the action taken to the definitions of Rehosting and Replatforming.

Moving to Amazon RDS introduces a platform change (from self-managed to AWS-managed) to optimize operations, which is the definition of Replatforming (lift-tinker-and-shift). Rehosting would mean running the database on Amazon EC2 with no operational optimizations to the platform itself.

This confirms Replatforming as the correct strategy.

Key Concept

Replatforming Migration Strategy

Estimated Time:1m 0s

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Step-by-Step Solution

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