IT staff in any enterprise need different perspectives to get a comprehensive view of the health of the various business services and the underlying IT infrastructure. In the previous chapter, the various models of visualizing the IT infrastructure were introduced. Oracle Enterprise Manager (OEM) is one of the industry leaders in the system management products arena. OEM 11gR1 addresses the complexities of managing today's IT infrastructure by providing different models for visualization.

This chapter will introduce the enterprise IT modeling concepts such as passive and active monitoring capabilities of the OEM. It will also provide an overview of the architecture of OEM. It will cover definitions of concepts such as Oracle Management Server (OMS), OEM agent, targets, metrics, alerts, beacons, and service tests. This will be followed by an introduction to system and service target types in OEM. The chapter will...