Managing Serviceguard Eighteenth Edition, September 2010

NOTE: For design and configuration information about clusters which span subnets,
including site-aware disaster-tolerant clusters, see the documents listed under
“Cross-Subnet Configurations” (page 41).
Figure 3-6 After Package Switching
Failover Policy
The Package Manager selects a node for a failover package to run on based on the
priority list included in the package configuration file together with the failover_policy
parameter, also in the configuration file. The failover policy governs how the package
manager selects which node to run a package on when a specific node has not been
identified and the package needs to be started. This applies not only to failovers but
also to startup for the package, including the initial startup. The failover policies are
configured_node (the default), min_package_node, site_preferred and
site_preferred_manual. The parameter is set in the package configuration file.
See “failover_policy” (page 292) for more information.
Package placement is also affected by package dependencies and weights, if you choose
to use them. See “About Package Dependencies” (page 179) and “About Package
Weights” (page 187).
72 Understanding Serviceguard Software Components