Monitors: determines health information and make sure items are working within specifications. Raise an alert if not.
Monitor can have up-to 3 status:
Types of monitors:
Roll up monitors
Aggregate rollup monitors, dependency rollup monitors.
SNMP, WMI PERFORMANCE, Log files, windows events, windows services, windows performance counters, scripting, WMI events.
Ø Unit: monitors a specific item, such as single event or performance counter. These can be used as a basis for roll up monitors.
Ø Aggregate roll-up: monitors a group of monitors with the roll-up state being either best or worst of reflection.