Patterns and horizontal discovery

You can use patterns to gather information about devices and applications during the identification and exploration phases of horizontal discovery instead of using probes and sensors.

Patterns and the phases of Discovery

When you kick off discovery, the discovery and classification phases run as they would if you were not using patterns. Discovery only looks to the operations in the pattern after the classification phase ends.

Discovery uses a pattern instead of probes and sensors for the identification and exploration phases by detecting the Horizontal Pattern probe on the classifier. If you do not specify this probe and no other probes are active, horizontal discovery stops after the classification phase. If other probes are active, Discovery attempts to use those probes.

For more details on the overall process flow, see Horizontal discovery process flow with patterns.

Patterns and the identification rules

Based on the CI type you are trying to discover, patterns determine which identification rules to use. These rules tell Discovery how to determine if the device already exists in the CMDB.

Note: When you use patterns for discovery, the identity probe is not used. Discovery uses the appropriate identifier rules based on the CI type that you are trying to discover as specified in the pattern operations. The operations in the pattern along with these identifier rules perform the identification and exploration phases of discovery. See Use a pattern for horizontal discovery for more information.

When you create a pattern, you specify the main CI type that you attempt to discover. Pattern discovery supports the discovery of multiple CIs that belong to the main CI type. For example, if your main CI type is Tomcat Server, the pattern can find several instances of Tomcat Servers on your network and create a CI for each. See Create or modify a pattern for instructions on creating a pattern.