Use the Data Retention page (Settings icon > Database Settings > Data Retention) to specify for how long NetMRI should archive or delete various types of data.

Delete After specifies the number of days after which data is eligible to be deleted from the appliance.
Pay careful attention to the Delete After settings to ensure that your organization retains any bodies of information for periods of time mandated by organization policy. One Data Retention setting, Network Inventory History, governs a number of important data tables in Network Explorer, including the following:
- Switch Port Management –> all Devices, Interfaces and End Hosts tables;
- Inventory – all Devices, Virtual Devices, Interfaces, OSs, and Models tables;
- All Discovery data.
Archive After specifies the number of days after which data is eligible to be moved to the archive. Archived data is still available, but reports will require more time to access it. Data can be archived in VM environments that have been configured for archive storage on the Settings icon > Database Settings > Storage Management page.

Other data retention categories include the following:

Change Record History: The data collection of device configuration changes detected and recorded by NetMRI, such as router and switch config changes and other change events (Network Analysis –> Changes page);
Configuration History: Compilation of all device configurations detected and stored in the NetMRI system;
Aggregated Interface Performance Data History: Contains records of all hourly and daily interface performance data aggregated by NetMRI from the ‘raw’ interface performance data compiled from every polling period;
Raw Interface Performance Data History – Contains the complete “raw” collection of performance information for all interfaces managed by NetMRI that is compiled every polling period (every 15 minutes by default; this time increment depends on the system configuration);
Issue Analysis and Status History: Compilation of all Issues information (Network Analysis –> Issues page);
System Events and Notifications Logs: Compilation of all event logs and notifications from all managed devices. Data is included from the User Audit Log and the Device Audit Log in the Device Viewer for each managed device; this setting also applies to the dataEngine.log and discoveryServer.log files managed through the Settings icon > Settings & Status > Logs.

To change data retention times for a type of data, do the following:

Click Edit.
In the Set Data Retention dialog, enter a Delete After value (in days).
If archive storage has been configured: Enter an Archive After value (in days).
Click Save & Close.

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