Planning Activity > Capacity Planning > Historical Size report
This report shows the historical supply vs. demand. Supply is defined as all available free space on all the tape media in the backup application. This number is calculated by taking the average size of all full media of the same tape type. That average is then used for the predicted size of all other tapes that are not full of the same type. Use of the average is necessary since tapes do not have an exact capacity and are written to until the end of tape mark. On the demand side this is a calculation of all backup jobs for the time period. The idea for this report is that the difference between the two lines is the extra capacity that was not needed. In an ideal environment these lines match the blue line, for example, being slightly under the line showing that all the space for backups is used. This report can sometimes be referred to as the "just in time inventory" report after the business theory by the same name.
The default is to show the total environment but for operational use it would need to be filtered down to individual storage locations since some can be closer to 100% capacity than others. This change is easily made by clicking Edit Report at the top of the report.
The EMM Server column has been removed from the Media filter. The Primary Server filter can be used to view data for specific servers instead of the EMM Server column.