snmpcollector Theory of Operations - CA Unified Infrastructure Management Probes - CA Technologies Documentation
Interactions with QoS and Alarm Data
QoS and alarm data is forwarded to the primary hub by two different processes. QoS data is passed from the remote hub to the primary hub through queues on the message bus. Queues must be configured for QoS data (QOS_MESSAGE and QOS_DEFINITION), and probe_discovery.
Every remote hub with snmpcollector must have baseline_engine, prediction_engine, alarm_enrichment, and NAS installed to enable threshold alarms. The baseline_engine probe monitors the message bus for QoS data that breaches the defined thresholds. The predictive_engine probe is required to enable TimeToThreshold settings, and the alarm_enrichment probe is required to enable TimeOverThreshold settings. As alarm messages occur, the data is passed on to the primary hub through NAS. Matching versions of NAS must exist on the primary hub and the remote hub so that alarm messages can be sent between the hubs. In order to avoid duplication of alarms, an alarm queue should not be present and the instance of NAS on the remote hub must be configured to send all alarm events in both directions.
The following diagram shows how QoS and alarm data flows from the remote hub to the primary hub.