H3C Technologies H3C Intelligent Management Center - Manual (Page 64)

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Viewing database usage trend statistics
NTA enables you to view the NTA database usage over time.
To view the NTA disk space usage trends:
1. Select Service > Traffic Analysis and Audit > Settings.
2. In the Settings area of the Traffic Analysis and Audit page, click the Database Space link.
NTA displays all file and disk space usage statistics in the database space usage list displayed in
the main pane of the Database Space page.
3. Click the contents of the Server Name field for the NTA server for which you want to view statistics.
The database usage trends for the associated server are displayed.
By default, a graphical representation of database disk space usage over the last twenty-four hours
appears in the Database Space Usage Trend graph.
In addition, NTA displays the tabular data for usage trends over the last twenty-four hours in the
lower half of the page.
From the Time list in the Query Database Space Usages area of the page, select the time range for
which you want to view database usage statistics to change the time range for this graph and table.
Options are Last 24 hours, Last 7 days, Last 30 days, Last 3 months, and Custom.
4. To enter a user-defined time range, select Custom from the Time list.
• Start Time—To autopopulate this field, click the Calendar icon . A popup calendar
appears. Select the start date and time from the calendar. Adjust the hour and minute values
through the slide bars.
• End Time—To autopopulate this field, click the Calendar icon . A popup calendar
appears. Select the end date from the calendar. Adjust the hour and minute values through the
slide bars.
5. Click Query. The page displays the result of your query.
6. Click Reset when you have finished reviewing the results of your query, and to return the page to
its default twenty-four hour usage trend view.
Data export
The Data Export feature allows the NTA server to export the traffic data in the database to the external
data files. An operator can use the auditing tool provided by NTA to audit the network traffic data in the
data files. A data file can be saved on a server for up to 90 days, and is deleted automatically after 90
days.
After you enable data export, either log lifetime or data space alarm can trigger data export.
• Log Lifetime—NTA checks the lifetime of each log in the database at around 3:00 every day. A log
whose lifetime expires is exported to a data file. The data export triggering condition always takes
effect, regardless of whether data export is enabled. The log lifetime is set in the NTA system
parameters. For information about modifying the log lifetime, see " Configuring NTA traffic analysis
parameters ."
• Data space alarm—With the Trigger Data Export by Data Space Alarm option selected, when the
data space alarms occur, the NTA server automatically exports the oldest data day by day until the