Database Backup (DBS) allows you to back up your database data in a continuous and cost-effective manner. DBS provides a variety of instance types, including micro, small, medium, large, and xlarge. A more advanced instance type offers a lower unit price and higher performance. This topic describes how to select a DBS instance type.
DBS instance types
|Scenario||Instance type||Free quota and unit price||Estimated time taken to back up 100 GB of data|
Database backup scenarios involve four concepts: database disk space, data file size, backup data volume, and storage data volume.
|Database disk space||The disk space of a database consists of the data file size and log file size of the
database, and the file size and available space of the operating system of the server
where the database resides.
|Data file size||The data file size of a database equals the disk space that the data files of the
database occupy on the server where the database resides.
You can perform the following operations to view the data file size of a database:
|Backup data volume||The backup data volume of a database refers to the volume of data that you back up by using DBS. This volume depends on a variety of factors such as the database type, backup mode, and backup granularity.|
|Storage data volume||The storage data volume of a database refers to the volume of data that you store in the storage system. This volume depends on a variety of factors such as the backup data volume, the storage format of backup data, and the compression algorithm.|