The environment to be backed up requires careful analysis. This section provides guidelines for issues that require consideration.
The first step is to determine how much data needs backing up or archiving regularly. Two main factors are:
Characterization of dataset changes—how much data will be saved by the incremental backups
Total Dataset Size
The total size of the existing dataset is an indication of the minimum storage capacity required. The size of the dataset is the amount of data that must be backed up during a full backup and is the starting point in calculating the total storage capacity required.
Total dataset size can be one of the easiest pieces of information to obtain. ...