Availability Guide for Problem Management

Problem Management Tools

Availability Guide for Problem Management–125509

9-29

Open Notification Service (ONS)

The ONS Subagent gathers Event Management Service (EMS) events from the Tandem

system event log, $0, and translates these events into Simple Network Management

Protocol (SNMP) traps that are sent to a network management platform through the

Tandem NonStop agent.

ONS gathers EMS events from the following Tandem subsystems:

•

Object Monitoring Facility (OMF)—all events

•

Transaction Monitoring Facility (TMF)—all events

How ONS Works

ONS comprises a set of processes, files, and management information bases (MIBs) that

work together to translate Tandem subsystem events into SNMP traps. Figure 9-10

illustrates the basic architecture and components of ONS.

Using EMS Distributors

After confirming an appropriate operating environment, ONS uses the NEWPROCESS

system library procedure to create two EMS consumer distributors to retrieve subsystem

event data from the system event log, $0. The first distributor, $ZNSDS, retrieved

Syshealth events only. The second distributor, $ZNSDG, retrieves events from the

Object Monitoring Facility and Transaction Monitoring Facility subsystems.

The Syshealth distributor, $ZNSDS, is dedicated to Syshealth events to ensure that

Syshealth problem reports are delivered efficiently even if the event flow is heavy.

$ZNSDS allows $ZONS (the process that translates EMS events to SNMP traps) to

process problem reports without having to process a queue of subsystem events first.

$ZNSDS maintains its own file pointers and delivers the problem report to $ZONS as

soon as $ZONS requests it.