HP Serviceguard Version A.11.19 Release Notes, October 2009

The sole exception to this rule is a rolling upgrade, during which Serviceguard versions
can be mixed temporarily, but no cluster configuration changes are allowed. See
“Upgrading from an Earlier Serviceguard Release” (page 62) , and Appendix D of
Managing Serviceguard, at the address given under “Documents for This Version ”
(page 50).
Mixed Hardware Architecture
As of HP-UX 11i v2 Update 2 (0409) and Serviceguard A.11.16, Serviceguard supports
mixed-hardware-architecture clusters, consisting of HP 9000 and Integrity servers.
Mixed-hardware-architecture clusters support the same volume managers, at the same
version level, as Serviceguard clusters in which the server hardware is of a single type.
The following restrictions apply:
• Except during a rolling upgrade, all nodes must be running:
— The same HP-UX version
NOTE: HP-UX version in this context means major release, such as 11i v2. It
is acceptable to have a mix of different HP-UX Fusion releases for the same
major revision (for example, 11i v2 September 2004 and 11i v2 September 2006),
although it is generally best to have all nodes running the same Fusion release.
A mix of HP-UX 11i v2 and 11i v3 nodes is also allowed, but entails some
restrictions; see “Mixed HP-UX Operating-System Revisions” (page 53).
— The same version of Serviceguard
— The same version of any volume manager or file system that is independent
of HP-UX
and in addition, HP strongly recommends that all nodes be running:
— The same patch level for LVM and SLVM
— The same patch level for HP-UX, Serviceguard, and volume managers and
related subsystems (for example Veritas VxVM, and VxFS)
• All applications running in the cluster must adhere to the vendor’s requirements
for mixed Integrity and HP 9000 environments.
• The cluster cannot use Oracle RAC. (SGeRAC is not supported in a
mixed-hardware-architecture cluster because Oracle RAC does not support mixing
hardware architectures within a single RAC cluster.)
For more information about mixed-hardware-architecture clusters, see Configuration
Rules for a Mixed HP 9000 /Integrity Serviceguard Cluster at http://www.docs.hp.com
-> High Availability -> Serviceguard —> White Papers.
Mixed HP-UX Operating-System Revisions
Before A.11.18, Serviceguard required all nodes in a cluster to be running the same
HP-UX revision, except during a rolling upgrade. As of Serviceguard A.11.18 a cluster
Compatibility Information and Installation Requirements 53