Selecting TopN Collector in the left panel of the Options tab provides the following view, where you can enable the TopN collector and host name resolution, and configure the number of days ExtremeCloud IQ Site Engine maintains the TopN history. The TopN Collector gathers the application, client application, client, and server data used in TopN reports. It also collects the signal strength data reported by Wireless Controllers.
Changing a value from the system default causes a Default Value button to appear. Selecting this button changes the field back to the system default value.
- Enable TopN Collection
- Select this option to enable the TopN Collector. Deselecting this option disables all other fields in the panel. Changes to this option take place immediately.
- Enable Host Name Resolution
- Select this option to resolve host names to IP addresses and IP addresses to host names, if possible. This option allows you to disable host name resolution for TopN only. (Host name resolution is enabled globally using the Enable Name Resolution option.) Changes to this option take place immediately.
History
- TopN History Data Retention
- Use this setting to determine the number of days TopN information remains available for viewing in reports. The default number of days is 30, with a minimum value of 1 day and a maximum value of 180 days. Changes to this option take effect with the next nightly TopN history cleanup task performed by the ExtremeCloud IQ Site Engine server.
NetFlow
The TopN Collector collects the data used in TopN reports for applications, client applications, clients, and servers. The collector collects data over a one hour time period. At the end of the hour, the collector evaluates the data and stores only the most significant details collected for that hour. When changing the value for Maximum Entries in Memory or Maximum Entries to Persist, the new value takes effect during the next hour of data collection. For example, if you change the value at 3:05 or 3:55, the new value takes effect during the hour that starts at 4:00.
If more entries are needed during the hour than the maximum, additional entries are stored on disk, which is slower. This results in a direct trade-off in memory usage versus CPU usage. Increasing these values might use more memory and decreasing these values might use more CPU.
Collect Top Applications
- Collect NetFlow Application Statistics
- Select this checkbox to enable the collection of application TopN data.
- Maximum Entries in Memory
- Specify the number of application entries to save during each hourly interval to use in TopN reporting. The default maximum number of entries in memory is 10,000 with a minimum value of 1,000 and a maximum value of 1,000,000.
- Maximum Entries to Persist
- Specify the number of application entries to save at the end of each hourly interval. The default number of entries to persist is 100, with a minimum value of 5 and a maximum value of 1,000.
- Collect Clients for Application Statistics
- Select this checkbox to enable the collection of data about the clients using the applications in TopN data.
- Maximum Client Entries in Memory
- Specify the number of client entries to save during each hourly interval to use in TopN reporting. The default maximum number of entries in memory is 10,000 with a minimum value of 1,000 and a maximum value of 1,000,000.
- Maximum Client Entries to Persist
- Specify the number of client entries to save at the end of each hourly interval. The default number of entries to persist is 100, with a minimum value of 5 and a maximum value of 1,000.
- Save Only Well-Known Applications
- Select this checkbox to save only data from well-known applications in the TopN data.
Collect Top Clients
- Collect NetFlow Clients Statistics
- Select this checkbox to enable the collection of client TopN data.
- Maximum Entries in Memory
- Specify the number of client entries to save during each hourly interval to use in TopN reporting. The default maximum number of entries in memory is 10,000 with a minimum value of 1,000 and a maximum value of 1,000,000.
- Maximum Entries to Persist
- Specify the number of client entries to save at the end of each hourly interval. The default number of entries to persist is 100, with a minimum value of 5 and a maximum value of 1,000.
Collect Top Servers
- Collect NetFlow Servers Statistics
- Select this checkbox to enable the collection of server TopN data.
- Maximum Entries in Memory
- Specify the number of server entries to save during each hourly interval to use in TopN reporting. The default maximum number of entries in memory is 10,000 with a minimum value of 1,000 and a maximum value of 1,000,000.
- Maximum Entries to Persist
- Specify the number of server entries to save at the end of each hourly interval. The default number of entries to persist is 100, with a minimum value of 5 and a maximum value of 1,000.
Wireless Event
- Collect Wireless Clients RSS Statistics
- Select this checkbox to enable Wireless Controllers to collect signal strength data for TopN reporting.
- Maximum Entries in Memory
- Specify the number of signal strength entries to save during each hourly interval to use in TopN reporting. The default maximum number of entries in memory is 10,000 with a minimum value of 1,000 and a maximum value of 1,000,000.
- Maximum Entries to Persist
- Specify the number of signal strength entries to save at the end of each hourly interval. The default number of entries to persist is 100, with a minimum value of 5 and a maximum value of 1,000.
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