Service Availability: Principles and Practice

Chapter 6

Model Based Availability Management: The Availability Management Framework

Maria Toeroe

Ericsson, Town of Mount Royal, Quebec, Canada

6.1 Introduction

This chapter introduces the Availability Management Framework (AMF) [48], which is the key enabler for achieving service availability (SA) with SA Forum systems.

The chapter focuses on the main aspects that are essential for understanding AMF and it is based on the general availability concepts introduced in Chapter 1 of the book.

In particular, this chapter introduces first the perspective that application developers will face, the concepts of components and component service instances (CSIs), their interpretation and how they are exposed through the AMF application programing interface (API).

This is followed by the view of the AMF on these same concepts and their organization into a hierarchy of logical entities composing the AMF information model which forms the basis for the availability management performed by the AMF. This is also the view that site designers, site administrators need to understand as the information model is the interface through which AMF is instructed what it needs to manage, that is, the AMF entities and their features composing the system and the different policies applicable during the management such as the applicable redundancy, the error detection mechanisms, and the error recovery policies.

The information model also provides status information on the health and readiness of the different ...