Database backup scenarios involve the following concepts: database disk space, data file size, backup data size, and storage data size.
|Database disk space||The total space consumed by data files, logs, operating system files, and the available
space of the operating system of the server where the database resides.
|Data file size||The amount of disk space occupied by database data files on the server where the database
You can perform the following operations to view the data file size of a database:
|Backup data size||The amount of data backed up by using Database Backup (DBS). This size depends on a variety of factors such as the database type, backup mode, and backup granularity.|
|Storage data size||The volume of data stored in the storage system. This size depends on a variety of factors such as the backup data size, the storage format of backup data, and the compression algorithm.|
The following space sizes are in descending order: database disk space > data file size > backup data size > storage data size.