ApsaraDB for Relational Database Service (RDS) is a stable, reliable, and scalable online database service. Built with a distributed file system designed by Alibaba Cloud and incorporated with high-performance SSDs, ApsaraDB for RDS supports MySQL, SQL Server, PostgreSQL, Postgre Plus Advanced Server (PPAS) (highly compatible with Oracle), and MariaDB engines. It offers a complete database solution with disaster recovery, backup, restoration, monitoring, and migration to facilitate database O&M.
ApsaraDB for RDS offers two billing methods: pay-as-you-go and subscription. When you purchase an ApsaraDB for RDS instance, you can choose the instance type best suited for your data volume.
The pay-as-you-go billing method allows for instance type upgrades and downgrades at any time.
The subscription billing method allows for upgrades and downgrades at any time and at renewal.
If your data volume unexpectedly starts growing at an exponential rate, you can upgrade your ApsaraDB for RDS instance to the Dedicated Host type to process data at faster speeds.