Using Service Discovery › Topology Warnings

Topology Warnings

Topology warnings indicate that a Service Discovery policy could lead to one of the following topology issues:

Orientation

Occurs when a relationship points from a CI to a top-level service node. All relationships must orient from the root service to its child items. For example, this error could occur if you create an automatic relationship policy with a service as the target CI.

Double relationships

Occurs when more than one relationship using different propagation types exists between two CIs or if equivalent policies are applied to the same service. For example, this error could occur if you create a dynamic service with multiple policies using the same target class and different propagation type, or if you create an automatic relationship with multiple policies using the same source and target class with a different propagation type.

Cycles

Occurs when an item becomes related to itself, two items have separate relationships going in each direction, or when more than two items have a circular relationship structure. For example, this error could occur if you do the following:

• Create a dynamic service policy with a service CI as the target
• Create an automatic relationship policy with the same source and target USM type
• Create an automatic relationship with multiple policies that use the same USM types as source and target. For example, one policy with ComputerSystem as source and BackgroundProcess as target, and another policy with BackgroundProcess as source and ComputerSystem as target.
• Any automatic relationship has the same source CI as another policy’s target CI

Unmanageable services

Occurs when a policy creates the potential for an overwhelming number of CIs to be added to a service. For example, this error could occur if you create a dynamic service policy with only a USM type but no target filter criteria, or you create a dynamic service policy using a type that has several children in the USM type hierarchy. For instance, creating a dynamic service policy based on the USM type entity with no target filter conditions would add CIs of all USM types to a service and potentially impact SA Manager performance.

Topology warnings appear in the following locations:

• Confirm page when saving policy
• Details tab in a TOPOLOGY WARNINGS section when you select a policy from the Policies tab.
• Details tab when you select Dynamic Services, Automatic Relationships, Unmanaged Relationships in the Policies tab.
• Policies tab as red service and policy icons
• Policies tab tooltips

You can switch warning display settings in the Set Preferences dialog.

Service Discovery does not prevent the creation of policies that contain warnings. A warning does not mean that the potential problem will definitely occur. If you receive a warning, review the Service Discovery policy to help ensure the policy does not present problems.