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Prerequisites and Inverse Prerequisites

A standard Control-O/COSMOS prerequisite specifies a particular object that must be up before another specific object can be brought up.

Unless indicated otherwise, Control-O/COSMOS automatically applies the inverse relationship of all prerequisites as well. When bringing down objects, inverse application of Control-O/COSMOS prerequisites helps ensure that objects are brought down in a logical order during system shutdown.

For example, if object A can only be brought up when object B is already up, object B can only be brought down if object A is already down.

Although application of the inverse relationship is the default, exceptions to this can be specified in the optional WAY field (described below).

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Creating and Maintaining the Prerequisite Database