Event correlation is the
process of relating one event to other events.
distinguishes two event relationship types:
An event sequence. Events
that have the same type and the same source are considered part of an event
sequence, or an alarm. An alarm represents the complete lifecycle of a fault.
An event sequence hierarchy
(alarms), representing causality.
associates a new event to an existing alarm if the existing alarm has the same
event type and source as the new event.
Prime Collaboration raises an
alarm, if the number of related events received (by fault management system)
from the device element exceeds a specified threshold in a specified unit of
time, based on predefined correlation rules.
Example use cases:
Call Manager location goes
out-of-resource for more than five times over the last one hour.
CPU usage of a device is over
80% for the last 15 minutes.
You can modify these rules
and configure the number of event occurrences to set the trigger. This can vary
from two to 100. You can also set the time interval. You can modify these rules
Administration > Alarm
& Event Configuration > Rules Settings.
If an administrator does not specify a time interval, maximum
time period, or a count for a specific alarm, the default values for the time
interval, maximum time period, and count is attached on an alarm, device type,
or device class basis.