Threshold Band alerts and other exciting features released in Trisul Network Analytics 5.5
We are happy to announce a new release of Trisul Network Analytics with exciting new features that make it even more effective in deep streaming analytics of network traffic.
Threshold Band alerting [ docs ]
We sat down with a few of our customers with the most sensitive networks and observed how various Traffic Metrics were responding to real life situations. This helped us develop a simple yet effective “Threshold Band” feature that we are releasing now. Essentially Trisul now lets you attach ‘threshold bands’ to any metric. Once you attach a band, Trisul automatically calculates an upper and lower bound for that metric for each time-of-day and day-of-week combination. The concept itself is old, but we have made it really easy to attach any metric to a band, which is automatically recomputed every night.
![](http://104.248.118.224/wp-content/uploads/2020/03/band.png)
Currently we are using this to alert on statistical movement of a number of metrics such as
- total bandwidth
- concurrent flows : helped detect a DoS situation
- netflow volumes
- volumes of top 3 customers with revenue impact : if traffic below lower bound results in $ loss for them
- number of flows being setup up / sec
- number of flows terminated / sec
You can track any of the hundreds of thousands of metrics this way. In our next maintenance release, we are rolling out a
Read more about this feature in our Threshold Band Anomaly alert docs
Self monitoring
A new dashboard called Perf Stats now tracks metrics about Trisul’s own memory, CPU, disk usage. Quite surprisingly spikes in these third order metrics have led us to interesting findings.
![](http://104.248.118.224/wp-content/uploads/2020/03/perfstats.png)
Active Keys Monitor
A new dashboard keeps track of how many unique keys (entities) are being monitored in each counter group. The use cases are to get a really good visibility of ‘unique things’ in your network from various viewpoints. Trisul can also track Unique X or Y using Cardinality counters. See the post on Hyperloglog counters
![](http://104.248.118.224/wp-content/uploads/2020/03/activekeys.png)
New historical chart use interface
Now you can click on the ‘chart’ icon on any module to expand the chart to days or weeks.
![](http://104.248.118.224/wp-content/uploads/2020/03/toolbar1.png)
![](http://104.248.118.224/wp-content/uploads/2020/03/modmod2.png)
Other changes
On the backend there are several exciting changes
- LUA Scripting functionality has been added to counter group items
- Automatic recovery of crashed databases in rare cases of power failure
- New Netflow dashboards
- New License page
- Many UI fixes such as the ability to add any item to the menu in a single click
![](https://trisul.org/images/trisul.png)
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