Managing MC/ServiceGuard NFS for Linux, December 2002

MC/ServiceGuard NFS for LINUX Introduction
Supported Configurations
Chapter 114
Cascading Failover with Multiple Adoptive Nodes
Figure 1-4 shows a four-node package 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