Migrating between fundamentally incompatible database engines—such as moving from commercial legacy systems to cloud-native AlloyDB— is a major architectural shift. Architect this heterogeneous database migration using the DMS conversion workspace and Gemini to refactor database logic and stored procedures. Build reliable, rule-based pipelines with DMS mapping rules and ensure data fidelity via the Data Validation Tool (DVT). Develop the skills to systematically guide an enterprise migration from assessment to production cutover.