Managing Serviceguard Sixteenth Edition, March 2009

this does not mean the lightest load; the only thing that is checked is the number of
packages currently running on the node.)
Package placement is also affected by package dependencies and weights, if you choose
to use them. See “About Package Dependencies” (page 166) and “About Package
Weights” (page 174).
Automatic Rotating Standby
Using the min_package_node failover policy, it is possible to configure a cluster that
lets you use one node as an automatic rotating standby node for the cluster. Consider
the following package configuration for a four node cluster. Note that all packages can
run on all nodes and have the same node_name lists. Although the example shows
the node names in a different order for each package, this is not required.
Table 3-1 Package Configuration Data
FAILOVER_POLICYNODE_NAME ListPackage Name
MIN_PACKAGE_NODE
node1, node2, node3,
node4
pkgA
MIN_PACKAGE_NODE
node2, node3, node4,
node1
pkgB
MIN_PACKAGE_NODE
node3, node4, node1,
node2
pkgC
When the cluster starts, each package starts as shown in Figure 3-7.
How the Package Manager Works 73