RDS editions of ApsaraDB RDS for SQL Server and the scenarios of each RDS edition - ApsaraDB RDS

Description of RDS editions of ApsaraDB RDS for SQL Server

Series	Description	Scenario
RDS Basic Edition	The database system consists of only one primary RDS instance. Computing is separated from storage. Read-only RDS instances are not supported.	Personal learning. Microsites. Development and testing environments for small and medium-sized enterprises.
RDS High-availability Edition	The database system consists of a primary RDS instance and a secondary RDS instance. These instances work in high availability (HA) mode and support automatic failover. The secondary RDS instance cannot be accessed. Read-only RDS instances are not supported.	Production databases for large and medium-sized enterprises. Databases used in industries such as the Internet, IoT, e-commerce, logistics, and gaming.
RDS Cluster Edition	The database system consists of a primary RDS instance and a secondary RDS instance. These instances work in high availability (HA) mode and support automatic failover. The secondary RDS instances can be accessed. This increases the read capability of your database system. You can create 1 to 7 read-only instances to further improve the read capability. However, read-only RDS instances do not participate in the primary node election or workload switchover.	Production databases for large and medium-sized enterprises. Databases that are used in industries such as Internet-based new retail and automobile manufacturing, and databases that are used for Enterprise Resource Planning (ERP) systems.

Change the RDS edition of an RDS instance

Upgrading from RDS Basic Edition to RDS High-availability Edition applies to the following instances:
- SQL Server 2022 SE, SQL Server 2019 SE, SQL Server 2017 SE, SQL Server 2016 SE, and SQL Server 2014 SE
- 2022 Web (Basic Series), 2019 Web (Basic Series), 2017 Web (Basic Series), 2016 Web (Basic Series), 2012 Web (Basic Series)
- SQL Server 2016 EE and SQL Server 2012 EE Basic
Upgrading from RDS High-availability Edition to RDS Cluster Edition applies to the following instances:
- SQL Server 2022 SE, SQL Server 2019 SE, SQL Server 2017 SE, SQL Server 2016 SE, SQL Server 2014 SE, and SQL Server 2012 SE
- SQL Server 2016 EE, SQL Server 2014 EE, and SQL Server 2012 EE
Upgrading from RDS Basic Edition to RDS Cluster Edition applies to the following instances:
SQL Server 2022 Enterprise Cluster Edition, SQL Server 2019 Enterprise Cluster Edition, and SQL Server 2017 Enterprise Cluster Edition

Note

Other instances do not support changing the RDS edition. If you want to change the RDS edition of such instances, you must create a new instance and migrate the data from the original instance to the new instance.

View the RDS edition of an RDS instance

You can view the edition of your instance on the Basic Information page of the instance.

Instance types supported by various RDS editions

For more information, see Instance types for primary ApsaraDB RDS for SQL Server instances.

Features supported by various RDS editions

For more information, see Features.

Purchase an instance

For more information, see Create an ApsaraDB RDS for SQL Server instance.