# Amazon Database Migration Service Documentation

Amazon Database Migration Service (Amazon DMS) is a web service you can use to migrate data from your database that is on-premises, on an Amazon Relational Database Service (Amazon RDS) DB instance, or in a database on an Amazon Elastic Compute Cloud (Amazon EC2) instance to a database on an Amazon service. These services can include a database on Amazon RDS or a database on an Amazon EC2 instance. You can also migrate a database from an Amazon service to an on-premises database. You can migrate between source and target endpoints that use the same database engine, such as from an Oracle database to an Oracle database. You can also migrate between source and target endpoints that use different database engines, such as from an Oracle database to a PostgreSQL database.

## User Guides and References

- [Data Migration Guide](/en_us/dms/latest/userguide/): Provides a high-level overview of Amazon DMS concepts. Includes instructions on migrating data and replicating ongoing changes from relational databases, data warehouses, NoSQL databases, and other types of data stores into the Amazon Cloud.
- [Fleet Advisor Guide](/en_us/dms/latest/userguide/CHAP_FleetAdvisor.html): Describes how to plan database migrations with Fleet Advisor. Shows how to discover and assess on-premises databases, collect performance metrics in your inventory, and generate target recommendations for a migration to Amazon.
- [Schema Conversion Guide](/en_us/dms/latest/userguide/CHAP_SchemaConversion.html): Describes how to assess the complexity of a database migration to a new target in the Amazon Cloud. Explains how to automatically convert your source database schema and code objects to a format that is compatible with the new target database.
- [Amazon DMS Step-by-Step Database Migration Guide](/en_us/dms/latest/sbs/): Provides step-by-step walkthroughs that go through the process of migrating data to Amazon. The source or target database must be on an Amazon service.
- [API Reference](/en_us/dms/latest/APIReference/): Describes all the API operations for Amazon Database Migration Service in detail. Also provides sample requests, responses, and errors for the supported web services protocols.

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