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About the Administration Module 31

About Models and Scope in vFoglight

vFoglight makes use of a topology model to describe the logical and physical

relationships between data nodes. Hierarchy in topology models provides the context

for metrics and properties. vFoglight stores context information only once. The

relationship between nodes, metrics, properties, and other nodes propagates the context

across multiple data elements.

vFoglight stores metrics and properties next to one another. Unlike properties, that

describe nodes and are typically static in nature, metrics change over time as vFoglight

collects them. For example, in a host model, CPU ID is a property that describes a CPU

node while CPU Utilization is a metric that can change between sampling periods. If the

CPU ID changes, vFoglight adds a new node to the collection model with the new CPU

ID and associates any collected metrics such as CPU Utilization with the newly-created

node.

In vFoglight, the Data dashboards illustrate the collection model and the data nodes that

vFoglight creates as it collects performance metrics from monitored hosts. The Data

dashboard shows how nodes are organized and helps you identify paths to underlying

objects that you can use in vFoglight queries and dashboards. Similar to directory paths,

a path in the topology model traverses the collection model through a series of nodes,

properties, metrics, and events that are separated by forward slashes '/'. For example, a

path that retrieves the current average CPU utilization for a host can look like the

following:

HostModel/hosts/<host_name>/cpus/processors/<processor>/utilization/current/

average

For complete information about the Data dashboard, see the vFoglight User Guide. For

details on how to create dashboards, see the Web Component Tutorial.

vFoglight allows you to create rules and apply them to the data that you collect from

multiple sources in your monitoring environment. Rules are scope-specific which

means that they are associated with one or more topology types against which they run.

vFoglight uses cartridges to collect data from your virtual environment. It creates a

dynamic data model while collecting data and uses that data to populate views and

dashboards. The Administration Module allows you to manage vFoglight data

collectors, topology and rules that implement your business logic. It also lets you

manage security by granting user permissions to various vFoglight entities.

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Dell Vizioncore Bedienungsanleitung Seite 31