Cardinality Counting

Cardinality counters allow you to measure unique hits for keys within a counter group. For example, we can track how many unique IPs did each country see.

By default, Trisul ships with the following three cardinality counters enabled.

Cardinality Counter	Description
Unique Apps per Host	For each host, track how many unique apps were seen
Unique Hosts per Host	For each host, track how many unique hosts (peers) were seen
Unique Hosts per App	For each app, track how many unique hosts were seen

You may add your own cardinality counters to any counter group with the following restriction :

1. A maximum of 2 cardinality counters are allowed per counter group.

Creating cardinality counters

navigation

👉 Login as Admin → Select Context:default→ profile0 → Custom Counters → Cardinality

1. A list of existing counters is displayed
2. Click on New Cardinality Counter
3. Enter the following three fields

Fields	Description
Host Counter	The counter group whose members you want to attach this counter to
Cardinality Counter	The counter group whose uniqueness you want to count
Description	Recommended < 16 chars, describing the counter

Example

If you wanted a cardinality counter to count unique hosts for each country.

1. Host Counter Group = Country from dropdown
2. Cardinality Counter Group = Hosts from dropdown
3. Description = Unique Hosts

Using Cardinality Counters

Once configured, cardinality counters behave just like other counters. They appear as extra counters in the drop down lists, you can draw charts, trend over time, even set threshold crossing alerts on them.