HP Serviceguard Version A.11.20 Release Notes, August 2011

http://www.hp.com/go/hpsc
Compatibility Information and Installation Requirements
Read this entire document (and any other Release Notes or READMEs for related products you
may have) before you begin an installation.
Compatibility
For complete compatibility information see the Serviceguard/SGeRAC/SMS/Serviceguard Manager
Plug-in Compatibility and Feature Matrix posted at http://www.hp.com/go/hpux-serviceguard-docs.
Mixed Clusters
“Mixed cluster” has several meanings in the context of Serviceguard. The following are support
statements for various types of mixed cluster.
Mixed Serviceguard Versions
You cannot mix Serviceguard versions in the same cluster; all nodes must be running the same
version of Serviceguard.
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 41) , and Appendix D of Managing Serviceguard, at the
address given under “Documents for This Version” (page 33).
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 35).
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.)
34 Serviceguard Version A.11.20 Release Notes