--- title: "Capacity Planning for Backup Repositories" description: "The report forecasts free space utilization for backup repositories. The Capacity Planning for Backup Repositories report estimates the amount of free space available on backup repository(ies) and forecasts how many days remain before the..." canonical: "https://helpcenter.veeam.com/docs/mp/reports/capacity_planning_for_backup_repositories.html" breadcrumb: "Veeam MP Report Knowledge > Veeam Backup and Replication Reports > Capacity Planning for Backup Repositories" dateModified: "2026-09-10" --- # Capacity Planning for Backup Repositories The report forecasts free space utilization for backup repositories. ## Description The **Capacity Planning for Backup Repositories** report estimates the amount of free space available on backup repository(ies) and forecasts how many days remain before the repository will run out of available storage capacity. The report helps you ensure there is sufficient room for your backup data at any point in time. To calculate future performance, the report analyzes historical performance data for the specified period in the past, calculates the performance utilization trend and applies this trend to the forecast horizon. For better forecast accuracy, along with the performance trend the report provides trend’s confidence interval that represent the best- and worst-case scenarios. This allows you to estimate various possible outcomes and helps you rationally plan your resources. If the specified free space threshold is breached within the forecast interval, the report marks the repository as problematic. The report also provides recommendations on how to adjust repository storage resources to meet future demand for backup files: it calculates the amount of additional space that needs to be provisioned. ::: note To run the **Capacity Planning for Backup Repositories** report, you must have Veeam Management Pack for Microsoft System Center installed. ::: ## Parameters Performance Data From: defines a date in the past starting from which historical performance data will be used to calculate the performance trend. The report analyzes historical performance data starting from this date to the current date (data collection period). ::: note To make a forecast, the report must use historical performance data for at least 72 hours. ::: Forecast Horizon: defines the forecast period. The calculated performance utilization trend is applied to the time interval that starts from the current date to the forecast horizon date. ::: note The date in the **Forecast Horizon** field must be a date in future. ::: Scope: defines a list of backup repositories managed by Veeam Backup & Replication servers (by default, the **Veeam Backup Repository Group** is selected). The **Add Group** option returns a Group and all objects that the group contains. The **Add Object** option returns only the selected object. Threshold: Repository Free Space (%): defines the free space threshold as a percentage of total repository space. Show details: defines whether the report will display expanded or collapsed charts. ## Sample Usage Forecast the number of days left before the amount of free space on the selected backup repositories decreases to 30%. Use the historical performance data for the previous month to calculate the resource utilization trend. ### Instructions 1. Open the Capacity Planning for Backup Repositories report. 2. From the **Performance Data From** list, select *Previous Month* > *First Day* . 3. From the **Forecast Horizon** list, select a date in future (30 days from today). 4. In the **Scope** section, select the **Veeam Backup Repository Group** and click **Remove** . Then select repositories to include in the report. Click **Add Object** . In the **Add Object** window, click **Options** . In the **Options** window, click **Add** . In the **Class Name** search box, enter *repository* and click **Search** . Select the *Backup Repository* class in the list of search results, click **Add** and click **OK** . In the **Options** windows, click **OK** to apply the filter. In the **Add Group** window, click **Search** . The search will return a list of objects that belong to the *Backup Repository* class. Select the repositories, click **Add** and click **OK** . 5. In the **Threshold: Repository Free Space (%)** field, enter *30* . 6. From the **Show details** list, select *Expand Charts* . 7. Click **Run** to view the report. ### Report Output The **Infrastructure Described** table will provide an overview for all repositories included in the report scope: total capacity, amount of free space (in GB) and number of VMs. The **Performance Forecast Analysis and Recommendations** table will provide the following details for every repository:

Column

Description

Name

Name of the repository.

Analysis Result

Result of the prediction analysis. Possible analysis results are:

  • Passed means that the free space threshold will not be breached within the forecast period.
  • Failed means the free space threshold will be breached within the forecast period or has already been breached within the data collection period.

Constraining Resource

Resource for which the specified free space threshold will be breached first within the forecast period.

Days Left

Number of days left before the free space threshold is breached. The number of days is shown as the worst-to-best case range.

Recommendations*

Recommendations on appropriate storage allocation.

Recommendations for free space will be provided in case the specified threshold is breached within the forecast period or has already been breached within the data collection period.

*Recommendations are based on the worst-case scenario.

The **Overall Recommendations** table will provide recommendations for all repositories included in the report scope. Report details will provide in-depth forecast information for every repository included in the report scope. The **Overview** table will provide an overview for the repository: total capacity, amount of free space (in GB), total number of VMs and type of the backup repository (Windows, Linux or CIFS share). The **Performance Forecast** section will show a chart and a details table for the analyzed repository free space resource. The performance forecast charts will display the following types of data series for the analyzed data collection period: - *Trend and its deviation* represent free space utilization trend and the 95% confidence interval for it. The upper border of the confidence interval represents the best-case scenario. The lower border of the confidence interval represents the worst-case scenario. The width of the interval between the best and worst-case series depends on the variability of the collected historical performance data (the greater the variability, the wider the interval). - *Value* represents the historical data for the data collection period (that is, how the amount of repository free space was changing within the analyzed period) - *Threshold* represents the threshold specified for the amount of free space - *Capacity* represents the total repository capacity The performance forecast tables will provide the following details for the free space resource:

Column

Description

Aspect

Name of the analyzed resource (that is, the Free Space (%) resource)

Threshold

Specified threshold value

Prediction

Prediction on whether the free space threshold will be breached within the forecast period. Possible prediction values are:

  • Threshold will be achieved means that the free space threshold will be achieved within the forecast period in both worst- and best-case scenarios.
  • Threshold may be achieved means that only worst-case data series will breach the free space threshold within the forecast period.
  • Threshold will not be achieved means that neither best-case nor worst-case data series will breach the free space threshold within the forecast period.
  • Threshold is achieved means that the trend line has already breached the threshold.

Days Left

Number of days left before the specified free space threshold is breached. The number of days is shown both for the worst-case scenario and best-case scenario.

Metric Forecast

Predicted metric value on the forecast horizon date (that is, at the end of the forecast period). The metric value is shown both for the best-case scenario and worst-case scenario.

Available Resources

Amount of free space on the forecast horizon date (that is, at the end of the forecast period):

The amount of free space is calculated as the difference between the specified threshold value and the metric forecast value. Positive values mean that spare resources will be available. Negative values mean that extra resources are required to survive.

The values are shown both for the best-case scenario and worst-case scenario.