This topic introduces related RDS concepts.

Alibaba Cloud ApsaraDB for RDS (short for Relational Database Service) is a stable, reliable, and scalable online database service. Based on Alibaba Cloud distributed file system and high-performance SSD storage, ApsaraDB for RDS supports the MySQL, SQL Server, PostgreSQL, PPAS (compatible with Oracle), and MariaDB database engines and provides a portfolio of solutions to disaster tolerance, backup, recovery, monitoring, and migration to facilitate database operation and maintenance. For more information about the benefits of apsaradb for RDS, see Competitive advantages of ApsaraDB for RDS instances over user-created databases.

For more information about the features of each engine, see the following topics: