HP Serviceguard for Linux Version A.11.19 Release Notes, April 2009

New Online Cluster Configuration Capabilities
Serviceguard A.11.19 introduces new online cluster-management capabilities. The new
capabilities include:
• Changing the Quorum Server configuration
• Changing the lock LUN configuration
• Changing an interface from IPv4 to IPv6, or vice versa
For a summary of what can be changed online, with instructions and caveats, see the
section “Reconfiguring a Cluster” in Chapter 7 of the latest version of Managing
Serviceguard for Linux.
New Online Package Configuration Capabilities
Serviceguard A.11.19 allows you to perform most configuration changes to modular
packages, and many changes to legacy packages, while the package is running. For
details, instructions, and caveats, see the section “Reconfiguring a Package” in chapter
7 of the latest version of Managing Serviceguard for Linux, and in particular the subsection
“Allowable Package States During Reconfiguration”.
For information about legacy and modular packages, see Chapter 6 of the latest version
of Managing Serviceguard for Linux.
New Preview Capabilities
Many variables affect package placement, including the availability of cluster nodes;
the availability of networks and other resources on those nodes; failover and failback
policies; and package weights, dependencies, and priorities, if you have configured
them. You can preview the effect on packages of certain actions or events before they
actually occur.
Serviceguard A.11.19 provides two ways to do this: you can use the preview mode
(-t) of Serviceguard commands, or you can use the cmeval (1m) command to simulate
different cluster states. Alternatively, you might want to model changes to the cluster
as a whole; cmeval allows you to do this.
For more information, see “Previewing the Effect of Cluster Changes” in Chapter 7 of
Managing Serviceguard for Linux.
About Partial-Startup Maintenance Mode
Serviceguard provides a maintenance mode for modular, failover packages that allows
you to start the package partially and perform maintenance on some package modules
while the other modules are running. (See Chapter 6 of Managing Serviceguard for
information about package types and modules.) This is called partial-startup
maintenance mode, sometimes abbreviated to maintenance mode.
What’s in this Release 17