Google Database Migration Service enables migration to Cloud SQL and AlloyDB with serverless operation and minimal downtime. Pricing is per-byte migrated plus network egress. The service supports MySQL, PostgreSQL, and SQL Server as both sources and targets. Key features include continuous replication for online migration, automated promotion with minimal switchover time, and validation testing. For AlloyDB migrations: specific tooling optimizes migration from PostgreSQL sources. Migration jobs track progress with clear status and error reporting. Datastream service provides change data capture for broader migration scenarios including BigQuery as target. Assessment tools evaluate source database compatibility and estimate migration complexity. The serverless approach eliminates capacity planning for migration infrastructure. Page should cover: supported migration paths, DMS vs Datastream selection, AlloyDB-specific migration features, assessment and validation workflow, pricing model, comparison with AWS DMS and Azure DMS, and migration planning guidance.