Overview - ApsaraDB RDS - Alibaba Cloud Documentation Center

This topic describes the RDS editions and the scenarios of each RDS edition. This topic also describes how to view and change the RDS edition of an RDS instance.

ApsaraDB RDS for MySQL

Description of RDS editions

RDS edition	Description	Scenario
RDS Basic Edition	The database system consists of only a 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 HA mode and support automatic failover. The secondary RDS instances cannot be directly accessed. You can create read-only RDS instances to increase the read capability of your database system. For more information, see Create a read-only ApsaraDB RDS for MySQL instance.	Production databases for large and medium-sized enterprises Databases that are 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 multiple secondary RDS instance. These instances work in 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 multiple secondary RDS instances to increase the read capability of your database system.	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 ERP systems

Change the RDS edition of an RDS instance

Upgrade from RDS Basic Edition to RDS High-availability Edition: This applies if your RDS instance runs MySQL 5.7 or MySQL 8.0.
Upgrade from RDS High-availability Edition to RDS Cluster Edition: This applies if your RDS instance runs MySQL 5.7 or MySQL 8.0 and uses cloud disks.

Note

You cannot change the RDS edition of an RDS instance that does not meet the requirements in the preceding list. If you want to change the RDS edition of the RDS instance, you must create an RDS instance that runs the specified RDS edition and then migrate the data of the original RDS instance to the new RDS instance. For more information, see Create an ApsaraDB RDS for SQL Server instance and Migrate data between ApsaraDB RDS for SQL Server instances.

View the RDS edition of an RDS instance

You can go to the Basic Information page of your RDS instance to view the RDS edition of the RDS instance.

Instance types supported by various RDS editions

For more information, see Instance types for standard primary ApsaraDB RDS for MySQL instances (original x86 architecture).
For more information, see Instance types for economy primary ApsaraDB RDS for MySQL instances (original ARM architecture).

Features supported by various RDS editions

For more information, see Features.

Create an RDS instance

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

ApsaraDB RDS for PostgreSQL

Description of RDS editions

RDS edition	Description	Scenario
RDS Basic Edition	The database system consists of only a 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 HA mode and support automatic failover. The secondary RDS instances cannot be directly accessed. You can create read-only RDS instances to increase the read capability of your database system. For more information, see Create a read-only ApsaraDB RDS for MySQL instance.	Production databases for large and medium-sized enterprises Databases that are used in industries such as the Internet, IoT, e-commerce, logistics, and gaming

Change the RDS edition of an RDS instance

If your RDS instance runs one of the following database engine versions, you can upgrade the RDS instance from RDS Basic Edition to RDS High-availability Edition. For more information, see Upgrade an ApsaraDB RDS for PostgreSQL instance from Basic Edition to High-availability Edition.

PostgreSQL 15
PostgreSQL 14
PostgreSQL 13
PostgreSQL 12
PostgreSQL 11
PostgreSQL 10

Note

You cannot change the RDS edition of an RDS instance that does not meet the requirements in the preceding list. If you want to change the RDS edition of the RDS instance, you must create an RDS instance that runs the specified RDS edition and then migrate the data of the original RDS instance to the new RDS instance. For more information, see Create an ApsaraDB RDS for PostgreSQL instance and Migrate data between ApsaraDB RDS for PostgreSQL instances.

View the RDS edition of an RDS instance

You can go to the Basic Information page of your RDS instance to view the RDS edition of the RDS instance.

Instance types supported by various RDS editions

For more information, see Primary ApsaraDB RDS for PostgreSQL instance types.

Features supported by various RDS editions

For more information, see Features.

Create an RDS instance

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

ApsaraDB RDS for SQL Server

Description of RDS editions

RDS edition	Description	Scenario
RDS Basic Edition	The database system consists of only a 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 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 that are 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 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 up to seven read-only RDS instances to improve the read capability. However, read-only RDS instances do not participate in the primary instance 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 ERP systems

Change the RDS edition of an RDS instance

If your RDS instance runs one of the following database engine versions, you can upgrade the RDS instance from RDS Basic Edition to RDS High-availability Edition. For more information, see Upgrade the major engine version.
- SQL Server 2022 SE, SQL Server 2019 SE, SQL Server 2017 SE, SQL Server 2016 SE, and SQL Server 2014 SE
- SQL Server 2022 Web, SQL Server 2019 Web, SQL Server 2017 Web, SQL Server 2016 Web, and SQL Server 2012 Web
- SQL Server 2016 EE and SQL Server 2012 EE Basic
If your RDS instance runs one of the following database engine versions, you can upgrade the RDS instance from RDS High-availability Edition to RDS Cluster Edition. For more information, see Upgrade the major engine version.
- SQL Server 2022 SE, SQL Server 2019 SE, SQL Server 2017 SE, SQL Server 2016 SE, and SQL Server 2012 SE
- SQL Server 2012 EE and SQL Server 2016 EE

Note

View the RDS edition of an RDS instance

You can go to the Basic Information page of your RDS instance to view the RDS edition of the RDS 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.

Create an RDS instance

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

ApsaraDB RDS for MariaDB

Description of RDS editions

RDS edition	Description	Scenario
RDS High-availability Edition	The database system consists of a primary RDS instance and a secondary RDS instance. These RDS instances work in high availability mode. Dual-zone disaster recovery is supported. The secondary RDS instances cannot be directly accessed.	Production databases for large and medium-sized enterprises Databases that are used in industries such as the Internet, IoT, e-commerce, logistics, and gaming

View the RDS edition of an RDS instance

You can go to the Basic Information page of your RDS instance to view the RDS edition of the RDS instance.

Instance types supported by the RDS edition

For more information, see Instance types.

Features supported by the RDS edition

For more information, see Features.

Create an RDS instance

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