Managing MC/ServiceGuard NFS for Linux, December 2001

MC/ServiceGuard NFS for LINUX Introduction
Supported Configurations
Chapter 114
Cascading Failover with Multiple Adoptive Nodes
A package may be configured with up to three adoptive nodes. Figure 1-4
shows this configuration. If Node_A fails, Pkg_1 is adopted by Node_B.
However, if Node_B is down, Pkg_1 is adopted by Node_C, and if Node_C
is down, Pkg_1 is adopted by Node_D. The adoptive nodes are listed in the
package configuration file, which was generated by using cmmakepkg -p
file command (see Managing MC/ServiceGuard for Linux, Chapter 6)
in the order in which they will be tried. Note that all four nodes must
have access to the disks for the Pkg_1 file systems.
Figure 1-4 Cascading Failover, with Three Adoptive Nodes