Availability Guide for Application Design

Instrumenting an Application for Availability

Availability Guide for Application Design—525637-004

8-11

A Framework for Planning and Developing Your

Instrumentation

From an understanding of these relationships or constraints, it is easier to understand

the effect on the application of the failure of an object. Hence, you can determine which

objects are critical to the availability of your application and should be instrumented.

Many system objects are already instrumented within the subsystem that owns them.

In a Pathway application, for example, objects such as the PATHMON process and the

TCP are already instrumented. Careful analysis of the subsystem will help to establish

the need for additional event messages that the application must generate.

Figure 8-3. Pathway Application Objects and Their Relationships

Server

Class

PATHMON

System

Terminal

TCP

Program

Owns

Manages Manages

Manages

Executes

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