This topic provides an overview of ApsaraDB RDS for MariaDB and describes the related terms.

ApsaraDB RDS is a stable, reliable, and scalable online database service that is built on top of the Apsara Distributed File System and high-performance SSDs of Alibaba Cloud. ApsaraDB RDS supports the MySQL, SQL Server, PostgreSQL, and MariaDB database engines. ApsaraDB RDS provides a complete suite of solutions for various scenarios, such as disaster recovery, backup, restoration, monitoring, and migration, to facilitate database O&M. For more information about the benefits of ApsaraDB RDS, see Competitive advantages of ApsaraDB RDS instances over self-managed databases.

If your workloads are complex, you can purchase a support plan to obtain exclusive support provided by instant messaging (IM) enterprise groups, technical account managers (TAMs), and service managers.

For more information about ApsaraDB RDS, visit the ApsaraDB RDS for MySQL product page .


Some features or functions that are described in this document may be unavailable. The specific terms and conditions in your commercial contract shall prevail. This document serves as a user guide that is for reference only. Content in this document is provided without warranty of any kind, expressed or implied.


ApsaraDB RDS for MariaDB provides enterprise-level performance based on MariaDB. For more information about the supported features, see Features.

Basic terms

  • Instance: An RDS instance is a database process that consumes independent physical memory resources. You can specify a specific memory size, storage capacity, and database type for an RDS instance. The performance of an RDS instance varies based on the specified memory size. After an RDS instance is created, you can change its specifications or delete the instance.
  • Database: A database is a logical unit that is created on an RDS instance. One RDS instance can have multiple databases. Each database must have a unique name on the RDS instance on which the database created.
  • Region and zone: Each region is a physical data center. Each region has multiple isolated locations known as zones. Each zone has its own independent power supply and network. For more information, see Global infrastructure of Alibaba Cloud.

General terms

On-premises databaseA database that is deployed in a data center or a database that is not deployed on an ApsaraDB RDS instance.
ApsaraDB RDS for XX (XX represents one of the following database engines: MySQL, SQL Server, PostgreSQL, and MariaDB.)ApsaraDB RDS with a specific database engine. For example, ApsaraDB RDS for MySQL indicates an ApsaraDB RDS instance that runs MySQL.