Feature: allow threshold alerting on CDEF/calculated graph values #755
Description
Description
Thold can only monitor raw data sources, not computed graph values (e.g., a percentage calculated via CDEF from two data sources). Users need threshold alerting on calculated metrics like bandwidth utilization percentages.
Forum Reference
https://forums.cacti.net/viewtopic.php?t=61443
TheWitness suggested "Percentage Data Manipulation Type" but the user could not make it work. No follow-up was provided.
Use Case
Monitor bandwidth utilization percentage (calculated from inbound/outbound counters via CDEF) and trigger alerts when it exceeds a threshold.