ApsaraDB for Relational Database Service (RDS) is a stable and reliable online database service with auto-scaling capabilities. Based on Apsara distributed file system and high-performance SDD storage, RDS supports MySQL, SQL Server, PostgreSQL, and PPAS engines, and provides a complete set of solutions for disaster recovery, backup, recovery, monitoring, migration, and others. This helps you operate and manage your own database. For benefits of RDS, see Benefits.

This document describes RDS features and functions and further explains the procedure to configure RDS through the RDS console . You can also manage RDS through APIs and SDKs.

If you need technical assistance, you can open the RDS console and choose Support > Open a new ticket or click here  to submit a ticket.

For more information about functions and pricing of RDS, log on to official website of ApsaraDB for RDS.


Some features or services described in this document may be unavailable for certain regions. See the relevant commercial contracts for specific terms and conditions.

This document serves as a user guide. No content in this document can constitute any express or implied warranty.

The content of this document is updated based on product upgrade and many other factors. You must first verify the document with your latest software version.


RDS supports multiple types of databases. This document takes MySQL as an example to describe the features and usage of RDS. Some types of databases may not support certain features. The actual interface may vary slightly.

General terms

  • Instance: A database service process that takes up physical memory independently. You can set different memory size, disk space, and database type, among which the memory specification determines the performance of the instance. After the instance is created, you can change the configuration and delete the instance at any time.
  • Database: A logical unit created in an instance. Multiple databases can be created in an instance, and the database name is unique within the instance.
  • Region and zone: A region is a physical data center. A zone is a physical area that has independent power supply and networks within a region. For more information, see Alibaba Cloud Global Infrastructure.

Common conventions

Term Description
Local database/Source database Refers to the database deployed in the local equipment room or the database not on the ApsaraDB. In most cases, it refers to the source database to be migrated to the ApsaraDB in this document.
RDS for XX (MySQL, SQL Server, PostgreSQL, PPAS) It indicates the RDS of a specific database type, for example, RDS for MySQL means the instance enabled on the RDS with a database type of MySQL.