Amazon Database Migration Service

Migrate your databases to Amazon Web Services with minimal downtime

DMS Free Tier includes 750 Hours of Amazon DMS Single-AZ dms.t2.micro instance usage and 50 GB of included General Purpose (SSD) storage in Ningxia Regin; 750 Hours of Amazon DMS Single-AZ dms.t3.micro instance usage and 50 GB of included General Purpose (SSD) storage in Beijing region.

Amazon Web Services China Region • Always Free


Amazon Database Migration Service helps you migrate databases to Amazon Web Services quickly and securely. The source database remains fully operational during the migration, minimizing downtime to applications that rely on the database. The Amazon Database Migration Service can migrate your data to and from most widely used commercial and open-source databases.

The service supports homogenous migrations such as Oracle to Oracle, as well as heterogeneous migrations between different database platforms, such as Oracle to Amazon Aurora or Microsoft SQL Server to MySQL. It also allows you to stream data to Amazon Redshift, Amazon DynamoDB, and Amazon S3 from any of the supported sources, which are Amazon Aurora, PostgreSQL, MySQL, MariaDB, Oracle Database, SAP ASE, SQL Server, IBM DB2 LUW, and MongoDB, enabling consolidation and easy analysis of data in a petabyte-scale data warehouse. Amazon Database Migration Service can also be used for continuous data replication with high-availability.

The Amazon Web Services  Schema Conversion Tool makes heterogeneous database migrations predictable by automatically converting the source database schema and a majority of the database code objects, including views, stored procedures, and functions, to a format compatible with the target database. Any objects that cannot be automatically converted are clearly marked so that they can be manually converted to complete the migration. SCT can also scan your application source code for embedded SQL statements and convert them as part of a database schema conversion project. During this process, SCT performs cloud native code optimization by converting legacy Oracle and SQL Server functions to their equivalent Amazon Web Services service thus helping you modernize the applications at the same time of database migration. Once schema conversion is complete, SCT can help migrate data from a range of data warehouses to Amazon Redshift using built-in data migration agents.

Benefits

Simple to use

Amazon Database Migration Service is simple to use. There is no need to install any drivers or applications, and it does not require changes to the source database in most cases. You can begin a database migration with just a few clicks in the Amazon Web Services Management Console. Once the migration has started, DMS manages all the complexities of the migration process including automatically replicating data changes that occur in the source database during the migration process. You can also use this service for continuous data replication with the same simplicity.

Minimal downtime

Amazon Database Migration Service helps you migrate your databases to Amazon Web Services with virtually no downtime. All data changes to the source database that occur during the migration are continuously replicated to the target, allowing the source database to be fully operational during the migration process. After the database migration is complete, the target database will remain synchronized with the source for as long as you choose, allowing you to switchover the database at a convenient time.

Supports widely used databases

Amazon Database Migration Service can migrate your data to and from most of the widely used commercial and open source databases. It supports homogeneous migrations such as Oracle to Oracle, as well as heterogeneous migrations between different database platforms, such as Oracle to Amazon Aurora. Migrations can be from on-premises databases to Amazon RDS or Amazon EC2, databases running on EC2 to RDS, or vice versa, as well as from one RDS database to another RDS database. It can also move data between SQL, NoSQL, and text based targets.

 

 

Low cost

Amazon Database Migration Service is a low cost service. You only pay for the compute resources used during the migration process and any additional log storage.. This applies to both homogeneous and heterogeneous migrations of any supported databases. This is in stark contrast to conventional database migration methods that can be very expensive.

On-going replication

You can set up a DMS task for either one-time migration or on-going replication. An on-going replication task keeps your source and target databases in sync. Once set up, the on-going replication task will continuously apply source changes to the target with minimal latency. All DMS features such as data validation and transformations are available for any replication task.

Reliable

The Amazon Database Migration Service is highly resilient and self–healing. It continually monitors source and target databases, network connectivity, and the replication instance. In case of interruption, it automatically restarts the process and continues the migration from where it stopped. Multi-AZ option allows you to have high-availability for database migration and continuous data replication by enabling redundant replication instances.

Use cases

Homogeneous Database Migrations

In homogeneous database migrations, the source and target database engines are the same or are compatible like Oracle to Amazon RDS for Oracle, MySQL to Amazon Aurora, MySQL to Amazon RDS for MySQL, or Microsoft SQL Server to Amazon RDS for SQL Server. Since the schema structure, data types, and database code are compatible between the source and target databases, this kind of migration is a one-step process. You create a migration task with connections to the source and target databases, and then start the migration with the click of a button. Amazon Database Migration Service takes care of the rest. The source database can be located in your own premises outside of Amazon Web Services, running on an Amazon EC2 instance, or it can be an Amazon RDS database. The target can be a database in Amazon EC2 or Amazon RDS.

Homogeneous database migrations use case diagram

Heterogeneous Database Migrations

In heterogeneous database migrations the source and target databases engines are different, like in the case of Oracle to Amazon Aurora, Oracle to PostgreSQL, or Microsoft SQL Server to MySQL migrations. In this case, the schema structure, data types, and database code of source and target databases can be quite different, requiring a schema and code transformation before the data migration starts. That makes heterogeneous migrations a two-step process. First use the Amazon Schema Conversion Tool to convert the source schema and code to match that of the target database, and then use the Amazon Database Migration Service to migrate data from the source database to the target database. All the required data type conversions will automatically be done by the Amazon Database Migration Service during the migration. The source database can be located in your own premises outside of Amazon Web Services, running on an Amazon EC2 instance, or it can be an Amazon RDS database. The target can be a database in Amazon EC2 or Amazon RDS.

Heterogeneous database migrations use case diagram

Development and Test

Amazon Database Migration Service can be used to migrate data both into and out of the cloud for development purposes. There are two common scenarios. The first is to deploy development, test or staging systems on Amazon Web Services, to take advantage of the cloud’s scalability and rapid provisioning. This way, developers and testers can use copies of real production data, and can copy updates back to the on-premises production system. The second scenario is when development systems are on-premises (often on personal laptops), and you migrate a current copy of an Amazon Web Services Cloud production database to these on-premises systems either once or continuously. This avoids disruption to existing DevOps processes while ensuring the up-to-date representation of your production system.

Development and test use case diagram

Database Consolidation

You can use Amazon Database Migration Service to consolidate multiple source databases into a single target database. This can be done for homogeneous and heterogeneous migrations, and you can use this feature with all supported database engines. The source databases can be located in your own premises outside of Amazon Web Services, running on an Amazon EC2 instance, or it can be an Amazon RDS database. The sources databases can also be spread across different locations. For example, one of the source databases can be in your own premises outside of Amazon Web Services, while the second one in Amazon EC2, and the third one in an Amazon RDS database. The target can be a database in Amazon EC2 or Amazon RDS.

Database consolidation use case diagram

Continuous Data Replication

You can use Amazon Database Migration Service to perform continuous data replication. Continuous data replication has a multitude of use cases including Disaster Recovery instance synchronization, geographic database distribution and Dev/Test environment synchronization. You can use DMS for both homogeneous and heterogeneous data replications for all supported database engines. The source or destination databases can be located in your own premises outside of Amazon Web Services, running on an Amazon EC2 instance, or it can be an Amazon RDS database. You can replicate data from a single database to one or more target databases or consolidate and replicate data from multiple databases to one or more target databases.

Continuous data replication use case diagram

Intended Usage and Restrictions

Your use of this service is subject to the Amazon Web Services Customer Agreement.

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