Managing Serviceguard 12th Edition, March 2006

Understanding Serviceguard Software Components
How the Package Manager Works
Chapter 374
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 252. 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 240.
The multi-node packages are used in clusters that use the VERITAS
Cluster File System (CFS) and other HP-specified applications. They can
run on 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:
Figure 3-4 Package Moving During Failover