Managing Serviceguard 13th Edition, February 2007

Understanding Serviceguard Software Components
How the Package Manager Works
Chapter 3 75
all versions of HP-UX; see “About VERITAS CFS and CVM” on page 27).
This package is known as VxVM-CVM-pkg for VERITAS CVM Version 3.5
and called SG-CFS-pkg for VERITAS CVM Version 4.1. It runs on all
nodes that are active in the cluster and provides cluster membership
information to the volume manager software. This type of package is
configured and used only when you employ CVM for storage
management.
The process of creating the system multi-node package for CVM without
CFS is described in “Preparing the Cluster for Use with CVM” on
page 245. The process of creating the system multi-node package for
CVM with CFS is described in “Creating a Storage Infrastructure with
VERITAS Cluster File System (CFS)” on page 231.
The multi-node packages are used in clusters that use the VERITAS
Cluster File System (CFS) (on systems that support it; see “About
VERITAS CFS and CVM” on page 27) and other HP-specified
applications. They can run on several nodes at a time, but need not run
on all. These packages are used when creating cluster file system
dependencies.
The rest of this section describes the standard failover packages.
Failover Packages
A failover package starts up on an appropriate node when the cluster
starts. A package failover takes place when the package coordinator
initiates the start of a package on a new node. A package failover
involves both halting the existing package (in the case of a service,
network, or resource failure), and starting the new instance of the
package.
Failover is shown in the following figure: