4.1.2 Overview of Graph Creation

Graphs are defined using XML, and then imported into MEM. The new custom graph will now be displayed with the built-in graphs, which are sorted by name within the graph tab.

For an example graph on how to create a graph, see Section 4.1.9, “Creating a New Graph: An Example”.

The XML elements for creating a graph are as follows:

  • version

    The version number of the graph. Generally only important with the bundled graphs, and is only used internally.

  • uuid

    The unique id of the graph. Each revision (version) requires a new uuid, which is only used internally.

  • name

    The visible graph name, which is displayed within the graph listing. Note: graphs are sorted alphabetically.

  • frequency

    Optionally define the frequency for the graph, which defaults to 1 minute. May use seconds, minutes, hours, and days.

  • rangeLabel

    The Y-axis range label. For example, a graph about disk space usage may use MB.

  • series

    Each series contains a label and an expression. The label is the visible name of the series, and the simple expression defines it.

  • variables

    Each variables definition contains a name, instance, and dcItem element. The instance defines what the graph will act upon, and each dcItem element contains a nameSpace, className, and attribName:

    • nameSpace

      Namespace (type) of the data collection item.

    • className

      Class (namespace type) of the data collection item.

    • attribName

      Attribute name of the data collection item.

    See the listing of data collection items for available nameSpace, className, and attribName items.

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