HP Serviceguard Version A.11.20 Release Notes, April 2011

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 36).
Keep in mind that Serviceguard A.11.20 is supported only on HP-UX 11i v3.
◦ 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.hp.com/go/hpux-serviceguard-docs.
Mixed HP-UX Operating-System Revisions
A Serviceguard A.11.19 cluster can contain a mix of nodes running HP-UX 11i v2 and 11i v3,
with certain restrictions. You may want to take advantage of this fact when preparing to upgrade
the cluster to A.11.20; see in particular “Rules and Restrictions for Clusters in Transition” (page 37)
and “Rules and Restrictions for Heterogeneous Clusters” (page 38).
IMPORTANT: Serviceguard A.11.20 is supported only on HP-UX 11i v3.
For the purposes of this discussion we'll identify three broad cases: homogeneous clusters, clusters
in transition, and heterogeneous clusters.
36 Serviceguard Version A.11.20 Release Notes