Managing Serviceguard Eighteenth Edition, September 2010

weight_name A
weight_value 40
In pkg3's package configuration file:
weight_name B
weight_value 35
weight_name A
weight_value 0
In pkg4's package configuration file:
weight_name B
weight_value 40
IMPORTANT: weight_name in the package configuration file must exactly match the
corresponding CAPACITY_NAME in the cluster configuration file. This applies to case
as well as spelling: weight_name a would not match CAPACITY_NAME A.
You cannot define a weight unless the corresponding capacity is defined: cmapplyconf
will fail if you define a weight in the package configuration file and no node in the
package's node_name list (page 289) has specified a corresponding capacity in the cluster
configuration file; or if you define a default weight in the cluster configuration file and
no node in the cluster specifies a capacity of the same name.
Some points to notice about this example:
• Since we did not configure a B weight for pkg1 or pkg2, these packages have the
default B weight (15) that we set in the cluster configuration file in Example 3
(page 193). Similarly, pkg4 has the default A weight (20).
• We have configured pkg3 to have a B weight of 35, but no A weight.
• pkg1 will consume all of node2's A capacity; no other package that has A weight
can run on this node while pkg1 is running there.
But node2 could still run pkg3 while running pkg1, because pkg3 has no A weight,
and pkg1 is consuming only 15 units (the default) of node2's B capacity, leaving
35 available to pkg3 (assuming no other package that has B weight is already
running there).
• Similarly, if any package that has A weight is already running on node2, pkg1
will not be able to start there (unless pkg1 has sufficient priority to force another
package or packages to move; see “How Package Weights Interact with Package
Priorities and Dependencies” (page 196)). This is true whenever a package has a
weight that exceeds the available amount of the corresponding capacity on the
node.
194 Planning and Documenting an HA Cluster