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Introducing vFoglight 31

How vFoglight Works

that model type. For example, the HostModel type is a collection of Host objects; each

host object is one representation of the HostModel type.

vFoglight models provide context for the metrics collected from your monitored

environment. The model instances are dynamic and can change and expand

automatically as the resources you are monitoring change. This approach allows you to

correlate data from different nodes and to derive cluster data.

vFoglight model instances are similar to organizational charts whose nodes contain

properties: metrics and alarms are attached to the nodes, and a node can be connected to

one or more other nodes.

Creating a vFoglight model establishes a hierarchical relationship among the nodes that

represents information about the collected data. Nodes can represent physical elements

of the system, such as CPU or memory, or logical elements such as EJBs (Enterprise

Java Beans) or JSPs (Java Server Pages).

A simple host model instance is illustrated in the diagram below:

This diagram illustrates a collection model instance created using monitoring data for a

particular domain (for example, an infrastructure domain such as Windows), and which

is a representation of a collection model type.

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