HP Serviceguard Version A.11.19 Release Notes, October 2009

Dependencies”. See also the white paper Serviceguard’s Package Dependency Feature,
which you can find at the address given under “Documents for This Version ” (page 50).
Package Weights
Package weights and node capacities allow you to restrict the number of packages that
can run concurrently on a given node, or, alternatively, to limit the total package
“weight” (in terms of resource consumption) that a node can bear.
For example, suppose you have a two-node cluster consisting of a large system and a
smaller system. You want all your packages to be able to run on the large system at
the same time, but, if the large node fails, you want only the critical packages to run
on the smaller system. Package weights allow you to configure Serviceguard to enforce
this behavior.
For more information, see “About Package Weights” in Chapter 4 of the latest version
of Managing Serviceguard, and the white paper Using Serviceguard’s Node Capacity and
Package Weight Feature, which you can find at the address given under “Documents for
This Version ” (page 50).
New Support for IPv6
Serviceguard A.11.19 allows you to choose either the IPv4 or the IPv6 address family
for any subnet configured into the cluster, including subnets that carry the cluster
heartbeat, and those connected to a Quorum Server.
In addition, with the patches listed under “October 2009 Patches” (page 11), you can
configure an IPv6–only cluster; and the Quorum Server, if used, can also be an IPv6–only
system. The following are the possibilities for resolving the nodes' hostnames (and
Quorum Server hostnames, if any) to network address families:
• IPv4-only
• IPv6-only (requires July or later 2009 patch)
• Mixed
The default is IPv4. You can change it either by editing the cluster configuration file
and setting the appropriate value for the HOSTNAME_ADDRESS_FAMILY parameter,
or by using the new -a option of cmquerycl (1m). For more information, see “About
Hostname Address Families: IPv4-Only, IPv6-Only, and Mixed Mode” in Chapter 4 of
the latest version of Managing Serviceguard, at the address given under “Documents
for This Version ” (page 50).
Some restrictions apply, as follows.
Rules and Restrictions for IPv6-Only Mode
• You cannot use DNS or NIS for name-resolution in an IPv6–only cluster.
• You cannot use WBEMProvider or the SNMP Subagent in an IPv6–only cluster.
• You cannot configure an IPv6–only Continentalcluster.
26 Serviceguard Version A.11.19 Release Notes