Data History

The Admin > Settings > Data History tray contains the following settings:

Auto-Acknowledge Alarms

Number of days before alarms/events are automatically acknowledged

Alarm Retention Days

Maximum number of days that alarm/event data will be retained

Alarm Retention Size

Maximum amount of disk space (in MB) that can be used for alarm/event data before older records are deleted

Audit Log Keep Duration

Number of months audit logs will be retained

Auto History Trimming
Enables automatic trimming of older historical records based on the specified Minimum Percent Free Disk before Trimming setting
(Overrides history retention settings)

Days of DNS Request Data

Number of days (0 - 365) to retain DNS request data

Minimum Percent Free Disk before Trimming

Minimum amount of free storage to maintain when Auto History Trimming is enabled

Flow Historical 1 Min Avg

Number of hours to retain 1-minute summary tables (totals) of conversation data, as well as alarm/event data

Flow Historical 5 Min Avg

Number of hours to retain 5-minute summary tables (averages) of conversation data

Flow Historical 30 Min Avg

Number of days to retain 30-minute summary tables (averages) of conversation data

Flow Historical 2 Hr Avg

Number of days to retain 2-hour summary tables (averages) of conversation data

Flow Historical 12 Hr Avg

Number of weeks to retain 12-hour summary tables (averages) of conversation data

Flow Maximum Conversations

Number of top conversations to save for busy devices

Note

  • When Auto History Trimming is enabled, 1m and 5m historical tables are trimmed to maintain the value specified in Minimum Percent Free Disk Space before Trimming. Automatic trimming is also used to retain a similar level of historical data for all configured exporters.

  • Assigning a value of 0 to historical flow data retention settings under Data History will not disable retention of the corresponding data table.

Disk calculator

Clicking the calculator icon in the data history settings tray opens the database size calculator, which can be used to view current and predicted storage use based on a specified set of conversation history retention settings.

In the calculator, enter the desired retention time for each flow data history interval (1m, 5m, etc.), and then click the check button. Current and predicted disk usage for each interval will then be displayed by collector, along with the predicted total disk space required for the current retention settings.

Note

  • Disk usage for other elements/functions, such as system metadata, alarm/event data retention, and host indexing are factored into these calculations. A 10% buffer for the operating system is also included.

  • All calculations/predictions are based on the system’s current settings and collection parameters (flow volume/rate, templates, etc.).