Serviceguard Extension for RAC Version A.11.19 Release Notes, March 2009

• SGeRAC does not support a rolling upgrade from Cluster Volume Manager (CVM) version
4.1 to Cluster Volume Manager (CVM) version 5.0
• Serviceguard Extension for RAC does not support Mixed Clusters
All cluster nodes must be either HP 9000 or HP Integrity servers, but not both in the same
cluster
• Support for a maximum of 16-nodes in a cluster when Shared LVM, CVM, CFS, or ASM is
used
The A.11.19 version of Serviceguard Extension for RAC (SGeRAC) is a release that supports the
use of the HP-UX 11i v2 and 11i v3 operating systems, and provides the following additional
features and restrictions:
NOTE: Hostnames for SGeRAC cluster nodes can be up to 39 characters (bytes) long (The
former limit was 31 characters) SLVM subsystem on HP-UX 11i v2 only supports hostnames up
to 31 characters (bytes) long within the SGeRAC configuration
The cluster node name of a SLVM volume group will be shown in the vgdisplay command
output as the first 30 characters plus a ‘*’ character if the hostname is larger than 31 characters.
For a complete list of Serviceguard A.11.19 features and limitations, refer to the Serviceguard
Version A.11.19 Release Notes at http://docs.hp.com -> High Availability -> Serviceguard ->
Release Notes.
Support for Logical Volume Manager Version 2.0 (or later)
When using the volume groups that are supported with Serviceguard. The steps for configuring
the volume groups in Serviceguard clusters are very similar for both LVM version 1.0 and 2.0
(or later).
NOTE: For more information on using and configuring LVM version 2.0 (or later), see the
HP-UX 11i Version 3: HP-UX System Administrator's Guide: Logical Volume Management located at:
http://docs.hp.com -> Core HP-UX 11iv3 -> LVM Volume Manager
LVM version 2 (or later) has compatibility requirements as indicated in the note below. For a
complete list of support and compatibility requirements see the
Serviceguard/SGeRAC/SMS/Serviceguard Mgr Plug-in Compatibility and Feature Matrix at
http://docs.hp.com -> High Availability -> Serviceguard -> Support Matrixes
NOTE: LVM version 2 (or later) is only supported with SGeRAC version A.11.19 on HP-UX
11i v3.
For more information, see the following documents located at http://docs.hp.com
• HP-UX Logical Volume Manager and MirrorDisk/UX Release Note HP-UX 11i v3
• Serviceguard Version A.11.19 Release Notes
Support for Cluster Interconnect Subnet Monitoring
In SGeRAC, the Cluster Interconnect Subnet Monitoring feature is used to monitor cluster
communication subnets. This feature requires the use of a package configuration parameter
known as the CLUSTER_INTERCONNECT_SUBNET. It can be set up to monitor certain subnets
used by applications that are configured as Serviceguard multi-node packages with the following
restrictions:
• Cluster Interconnect subnet monitoring can support up to 4 nodes.
• Only one CLUSTER_INTERCONNECT_SUBNET can be specified per multi-node package.
The CLUSTER_INTERCONNECT_SUBNET parameter works similar to the existing SUBNET
package configuration parameter. The most notable difference is in the failure handling of the
8 Serviceguard Extension for RAC Version A.11.19 Release Notes