You can create instances that run different database engines in ApsaraDB for MyBase. MyBase for MySQL instances grant users more permissions than regular ApsaraDB RDS for MySQL instances. This topic provides an overview of ApsaraDB RDS for MySQL and introduces related concepts.

ApsaraDB for RDS is a stable, reliable, and scalable online database service. It is designed based on the Apsara Distributed File System and high-performance SSD storage media of Alibaba Cloud. It supports five database engines: MySQL, SQL Server, PostgreSQL, PPAS (compatible with Oracle), and MariaDB. It also provides a complete suite of solutions for various scenarios, such as disaster recovery, backup, restoration, monitoring, and migration. These solutions facilitate database operation and maintenance (O&M). For more information about the benefits of ApsaraDB for RDS, see Competitive advantages of ApsaraDB RDS instances over self-managed databases.


ApsaraDB RDS for MySQL is developed based on a branch of the MySQL source code. Its excellent performance has been proven over years of Double 11, during which it needs to handle large volumes of concurrent traffic. ApsaraDB RDS for MySQL provides basic features, such as instance management, account management, database management, backup and restoration, control access, Transparent Data Encryption (TDE), and data migration. ApsaraDB RDS for MySQL also provides the following advanced features and functions:

  • ApsaraDB for MyBase dedicated clusters: An ApsaraDB for MyBase dedicated cluster consists of multiple hosts, such as ECS instances of the ecs.i2.xlarge instance type and ECS Bare Metal instances. You can run instances on these hosts. For more information, see What is ApsaraDB for MyBase?
  • Read-only RDS instances: If the primary RDS instance is overwhelmed by a large number of read requests, your workloads may be interrupted. In this case, you can create one or more read-only RDS instances to offload read requests from the primary RDS instance. For more information, see Overview of ApsaraDB RDS for MySQL read-only instances. This scales up the read capability of your database system and increases the throughput of your application.
  • Read/write splitting: The read/write splitting function provides a read/write splitting endpoint. This endpoint connects to the primary RDS instance and all of the read-only RDS instances to establish an automatic read/write splitting link. For more information, see Read/write splitting. Your application can read and write data into your database system after it connects to this endpoint. ApsaraDB for RDS distributes write requests to the primary RDS instance and read requests to the read-only RDS instances based on the specified read weights. You can create more read-only RDS instances to scale up the read capability of your database system. In addition, you do not need to modify your application.
  • Dedicated proxy: A dedicated proxy uses dedicated computing resources. It provides more advanced functions, such as read/write splitting, short-lived connection optimization, and transaction splitting. For more information, see What are dedicated proxies?.
  • Database Autonomy Service (DAS): DAS supports intelligent diagnostics and optimization at the instance level based on various metrics. These metrics include SQL execution performance, CPU utilization, input/output operations per second (IOPS) utilization, memory usage, disk usage, number of connections, locks, and hotspot tables. For more information, see DAS overview. DAS allows you to identify existing and potential issues that may compromise the health of your database system. In addition, DAS provides details and solutions for the identified issues. This facilitates database maintenance.