Choose time constraints for your NTA data view

Date Range . Choose or define an overall window of time network activity data.

注: Detail rendered in graphs depends on the time window you choose (Date Range) along with how long your system retains raw, hourly, and daily time-series data (NTA data collection and Data Retention settings). NTA graphs network activity as time-series averaged over daily intervals, hourly intervals, or over shorter periods (raw). Raw data interval is defined by the Data Collection interval value in NTA settings.

重要: If you choose a time window outside of your NTA default data retention limits (47 hours for Raw and 19 days for Hourly, for example) your graph will default to an interval detail of Daily.

Detail Revealed with Default Retention Settings

Over time, the NTA collector cleans up older data. Eventually, collected data is combined into daily totals at the rates shown in the following table. If your site's mission and database capacity allow for more detailed data be retained for longer periods, increase the default retention settings for Interfaces in the NTA Settings dialog (SETTINGS menu > NTA Settings).

Report Time Window Selection

Data Interval Shown in Graph (default retention settings)

Example

0 – 47 hours

Raw

  • Data interval = every two minutes.
  • Default data retention = two days up to now. In other words, 47 hours plus the current fraction of the ongoing hour (unless extended in NTA Settings - Interface Data).

Class Based Quality of Service past 12 hours (raw detail dropped packets)

past 48 hours within the past 19 days

Hourly

  • Data interval = every hour.
  • Default data retention = 19 days plus the current fraction of a day (unless extended in NTA Settings - Interface Data).

Class Based Quality of Service last two days (hourly dropped packets)

20 days or more

Daily

Data interval = every 24 hours.

Daily is also the Archive data interval.

Class Based Quality of Service over the last 20 days (daily dropped packets)