Read-only instance
You can add read-only instances to your primary instance to process more read requests. For more information, see the following topics:
Read/write splitting
Read/write splitting is available to ApsaraDB for RDS instances that run MySQL, PostgreSQL and SQL Server. After you add read-only instances to your primary instance, you only need to enable read/write splitting. A read/write splitting endpoint is automatically generated to centrally receive and distribute query requests. For more information, see the following topics:
- Introduction to read/write splitting with ApsaraDB RDS for MySQL
- Introduction to read/write splitting with ApsaraDB RDS for SQL Server
- Introduction to read/write splitting with ApsaraDB RDS for PostgreSQL
Note ApsaraDB for RDS uses a primary/secondary architecture. In this architecture, the secondary instance does not process read or write requests but only serves as a backup to ensure high availability.