Introduction › Service Concepts › Propagation Types › Operative Propagation

Operative Propagation

Operative propagation indicates that the related item is affected only if the impact value of a CI exceeds a defined threshold. Operative propagation lets you specify policy that defines the impact value that the CI must exceed for impact to propagate to the parent CI. If the policy is not met, there is no impact to the CI or service.

Usage

Use operative propagation in the following situations:

• When a CI is only needed to be available, even if it is not performing well
• When the service is not affected unless the state of the CI is serious
• When you are not concerned with minor state changes as long as the CI is still running

Examples

Examples of appropriate situations to use operative propagation include the following:

• An application server may have operative propagation with a database server; the application server requires the database server to provide data storage and retrieval functions. As long as the database server is up, it is assumed that the application server is being served adequately to perform its function.
• An operating system may have operative propagation with the CI for its memory. In this case, operative propagation can prevent impact from the memory CI from propagating to the operating system unless the memory usage exceeds a defined threshold.

USM Relationships

The following USM relationships map to operative propagation by default in CA SOI:

• Has Requirement For
• Has Contact
• Has Detail
• Is Instance Of
• Is Request For
• Is Cause Of
• Is Discovered By
• Is Hosted By
• Is Resolved By

You must select one of these relationships to effect the operative propagation behavior. For example, you could assign Has Requirement For to an Application CI that requires an ApplicationServer CI to be running.

By default, operative propagation requires an impact value of 20 to propagate impact, and the default relationship is Has Requirement For. You can create propagation policy to define a different impact threshold.