Managing Serviceguard Eighteenth Edition, September 2010

3 Understanding Serviceguard Software Components
This chapter gives a broad overview of how the Serviceguard software components
work. The following topics are presented:
• Serviceguard Architecture
• How the Cluster Manager Works (page 59)
• How the Package Manager Works (page 67)
• How Packages Run
• How the Network Manager Works (page 89)
• Volume Managers for Data Storage
• Responses to Failures (page 116)
If you are ready to start setting up Serviceguard clusters, skip ahead to Chapter 5:
“Building an HA Cluster Configuration” (page 205).
Serviceguard Architecture
The following figure shows the main software components used by Serviceguard. This
chapter discusses these components in some detail.
Serviceguard Architecture 53