HP Serviceguard Version A.11.20 Release Notes, August 2011

• New Serviceguard capabilities allow you allow you to check the soundness of the cluster
configuration, and the health of its components, more thoroughly than you could in the past,
and to do so at any time, rather than only when changing the configuration of the cluster or
its packages.
See “Checking the Cluster Configuration and Components” (page 20).
• You can now you can use NFS-mounted (imported) file systems as shared storage in packages.
See “NFS-mounted File Systems” (page 22).
• New capabilities in Serviceguard and HPVM allow online migration of a virtual machine.
See the section “Online VM Migration with Serviceguard” in the white paper Designing
high-availability solutions with HP Serviceguard and HP Integrity Virtual Machines, at http://
www.hp.com/go/hpux-serviceguard-docs —> HP Serviceguard —> White papers.
• Serviceguard A.11.20 supports a new failover policy, site_preferred_manual, which
prevents automatic failover of a package across SITEs.
This capability can be used only in a site-aware disaster-tolerant cluster, which requires
Metrocluster (additional HP software).
Serviceguard on HP-UX 11i v3
Serviceguard support for HP-UX 11i v3 was first introduced in Serviceguard version A.11.17.01.
The following is a list of some important 11i v3 capabilities that Serviceguard supports.
• Serviceguard supports HP-UX agile addressing, sometimes also called persistent LUN binding,
for device special files (DSFs).
See “About Device Special Files (DSFs)” (page 30).
• Serviceguard supports HP-UX native multipathing and load balancing.
See “Native Multipathing, Veritas DMP, and Related Features in HP-UX 11i v3” (page 12).
• Serviceguard supports the following networking capabilities:
The HP-UX olrad -C command, which identifies network interface cards (NICs) that
are part of the Serviceguard cluster configuration.
You can remove a NIC from the cluster configuration, and then from the system, without
bringing down the cluster. See “About olrad” (page 28).
◦
◦ The LAN Monitor mode of APA.
• Serviceguard supports Process IDs (PIDs) of any size, up to the maximum value supported by
HP-UX and the node’s underlying hardware architecture.
Previous versions of HP-UX imposed a limit of 30,000; this limit has been removed as of HP-UX
11i v3. For more information, see the white paper Number of Processes and Process ID Values
on HP-UX at http://www.hp.com/go/hpux-core-docs —> HP-UX 11i v3 —> White
papers.
• Serviceguard supports the increased number of LVM volume groups supported as of the HP-UX
11i v3 0809 Fusion release; the maximum number of volume groups you can configure in a
Serviceguard cluster is the maximum supported by HP-UX. See the HP-UX documentation for
details.
• Serviceguard supports LVM 2.x volume groups, both for data and the cluster lock. See “About
LVM 2.x” (page 29).
14 Serviceguard Version A.11.20 Release Notes