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Working with vFoglight Rules and Registry 251
Working with Rules
An alarm is generated each time a multiple-severity rule enters a new state. In
addition, you can configure a multiple-severity rule to perform one or more
actions upon entering and/or exiting each state.
To define the rule type:
Note This procedure continues from “Getting started with rule definitions” on page 249.
Select the rule type.
In the Rule Definition tab, select one of the following Rule Type options:
•Simple Rule
Multiple-Severity Rule
From here, you can proceed to “Triggering rules” on page 251.
Triggering rules
The type of the trigger that you select determines when the rule’s conditions are
evaluated against the data that is collected from your monitored environment. You
configure a rule to have one of the following triggers:
Data-Driven Trigger. If a rule has a data-driven trigger, one or more if its
conditions will be evaluated every time that new data associated with one or more
topology types or objects to which the rule applies is sent to the vFoglight
Management Server. This option is selected as the default trigger.
Time-Driven Trigger. A time-driven trigger causes one or more of rule’s
conditions to be evaluated once per pre-defined interval. By default time-driven
rules are only evaluated if data for the evaluation of the condition is available.
For details on how to write conditions for data-driven and event-driven rules, see
Defining conditions for data-driven and time-driven rules” on page 263.
Event- Driven Trigger. An event-driven trigger causes one or more of rule’s
conditions to be evaluated every time a pre-defined event occurs. There are two
types of events that can act as rule triggers:
AlarmSystemEvent. Multiple-severity rules generate system events when a
rule severity level is reached. Alarm-based system events allow you to monitor
alarm-related system events.
ReportGeneratedEvent. Report generation creates events. You can monitor
those events as required and use them to trigger report-related events.
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