Threshold types
You configure most of these thresholds (group threshold is the exception) using either the Resource Editor GUI or the resmgr command.
Tivoli Netcool Performance Manager provides the following types
of thresholds to supply report viewers with the information they want.
- burst
- Ignores the natural network bursts by evaluating how long in a row the violations occurred per resource. Burst thresholds can be set and reset multiple times.
- period
- Involves the concept of accumulated duration for which the threshold is violated. This duration is accumulated per resource until the end of the SLA period. The threshold is violated as soon as a data spike's accumulated duration by period exceeds a certain duration of time. Period thresholds, once violated are not reset until the end of the period.
- risk
- A proactive threshold that detects resources that are at risk of violating a period threshold before the end of the SLA period.
- baseline
- Provides a view into resource behavior outside the normal range. It uses a profiled deviation function to compare the current daily behavior with the baseline as data flows throughout the system (in real time.) What is normal is defined and what is not normal is flagged.
Unlike burst, there is not a single threshold level to consider when determining duration. The duration determination scheme considers varying threshold levels. And unlike burst, period, and risk thresholds, you do not statically define the baseline, it dynamically adapts to historical data.