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184 vFoglight

Administration and Configuration Guide

About Rules, Registry, and Topology in vFoglight

vFoglight collects data about your system and dynamically builds topology models at

run-time. A topology model organizes the data in a way that represents the logical and

physical relationship between items in your monitored environment and provides the

context for the collected metrics. Each topology model includes one or more topology

types, and each type has an associated set of metrics. Topology objects are instances of a

topology type. For example, a Host model may contain Processor, Host, and Memory

topology types; a specific CPU would be an instance of the Processor topology type. For

more information on data and topology models, see Chapter 7, “Working with Data” on

page 327.

A registry variable can have a global value that is available to all topology types and

objects as well as multiple values that are associated with specific topology types or

objects. If required, these values can be configured to change at certain times. For more

information, see “Working with vFoglight Registry Variables” on page 184.

A rule is associated with a topology type and can be configured to run against specific

topology objects. Rule definitions can include registry variables, raw metrics, derived

metrics, and topology object properties. At run-time, vFoglight creates topology objects

and initiates rules to run against these objects, using registry variables, metrics, and

object properties as thresholds for alarm generation, as specified in rule definitions. For

more information, see “Working with Rules” on page 223.

Working with vFoglight Registry Variables

vFoglight registry variables can be used in rule conditions, expressions, and actions.

They are stored in the vFoglight registry. A registry variable can have a global value that

is available to all topology types and objects. It can also have multiple additional values

associated with specific topology types or objects, or calendar dates. In addition, these

values can be configured to change at certain times.

You create new registry variables, assign values to registry variables, and manage

registry variables using the dashboards that come with the Administration module.

Because registry variables can have multiple values that are tied to the topology or

dates, you can see verify their values and see how they are affected by these parameters.

For complete information, see the following sections:

•“Managing Registry Variables” on page 185

•“Creating Registry Variables” on page 195

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Dell Vizioncore Manual de usuario Pagina 184