Event Management

An event can be defined as any detectable or discernible occurrence that has significance for the management of the IT Infrastructure or the delivery of IT service and evaluation of the impact a deviation might cause to the services. Events are typically notifications created by an IT service, Configuration Item (CI) or monitoring tool.

Effective Service Operation is dependent on knowing the status of the infrastructure and detecting any deviation from normal or expected operation. This is provided by good monitoring and control systems, which are based on two types of tools:

• active monitoring tools that poll key CIs to determine their status and availability. Any exceptions will generate an alert that needs to be communicated to the appropriate tool or team for action
• passive monitoring tools that detect and correlate operational alerts or communications generated by CIs.

4.1.1 Purpose/goal/objective

The ability to detect events, make sense of them and determine the appropriate control action is provided by Event Management. Event Management is therefore the basis for Operational Monitoring and Control (see Appendix B).

In addition, if these events are programmed to communicate operational information as well as warnings and exceptions, they can be used as a basis for automating many routine Operations Management activities, for example executing scripts on remote devices, or submitting jobs for processing, or even dynamically balancing the demand for a service across multiple devices to enhance performance.

Event Management therefore provides the entry point for the execution of many Service Operation processes and activities. In addition, it provides a way of comparing actual performance and behaviour against design standards and SLAs. As such, Event Management also provides a basis for Service Assurance and Reporting; and Service Improvement. This is covered in detail in the Continual Service Improvement publication.

Scope

Event Management can be applied to any aspect of Service Management that needs to be controlled and which can be automated. These include:

• Configuration Items:
• Some CIs will be included because they need to stay in a constant state (e.g. a switch on a network needs to stay on and Event Management tools confirm this by monitoring responses to ‘pings’).
• Some CIs will be included because their status needs to change frequently and Event Management can be used to automate this and update the CMS (e.g. the updating of a file server).
• Environmental conditions (e.g. fire and smoke detection)
• Software licence monitoring for usage to ensure optimum/legal licence utilization and allocation
• Security (e.g. intrusion detection)
• Normal activity (e.g. tracking the use of an application or the performance of a server).

The difference betweenmonitoringandEvent Management

These two areas are very closely related, but slightly different in nature. Event Management is focused on generating and detecting meaningful notifications about the status of the IT Infrastructure and services.

While it is true that monitoring is required to detect and track these notifications, monitoring is broader than Event Management. For example, monitoring tools will check the status of a device to ensure that it is operating within acceptable limits, even if that device is not generating events.

Put more simply, Event Management works with occurrences that are specifically generated to be monitored. Monitoring tracks these occurrences, but it will also actively seek out conditions that do not generate events.

Date: 2014-12-29; view: 1048