Serviceguard Extension for RAC Version A.11.18 Release Notes, 3rd Edition, April 2008

NOTE: LVM version 2 is only supported with SGeRAC version A.11.18 on HP-UX
11i v3, and requires the Serviceguard April 2008 Patch (PHSS_37602 or later).
For more information, see the Serviceguard Version A.11.18 Release Notes at
http://docs.hp.com -> High Availability -> Serviceguard
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
SUBNETpackage configuration parameter. The most notable difference is in the failure
handling of the subnets monitored using these individual parameters. While the failure
of subnets monitored using SUBNET package configuration parameter is handled by
halting the instance of the package on the node where the subnet has failed, the failure
of subnets monitored using CLUSTER_INTERCONNECT_SUBNET package configuration
parameter is handled by ensuring at least one instance of the package remains running
in the cluster.
NOTE: A package with the CLUSTER_INTERCONNECT_SUBNET parameter is available
for both Modular and Legacy packages. A package with this parameter can be configured
only when all nodes of the cluster are running SGeRAC version A.11.18 or higher. For
more information, see the Managing Serviceguard Fifteenth Edition user’s guide at
http://docs.hp.com -> High Availability -> Serviceguard.
Support for Veritas CFS and CVM
SGeRAC A.11.18 on HP-UX 11i v2 and 11i v3 supports Veritas VxVM, CVM and CFS
5.0 from Symantec, with the following exceptions:
• SGeRAC supports a maximum of eight nodes for CVM and CFS.
• SGeRAC does not support CFS nested mounts.
14 Serviceguard Extension for RAC Version A.11.18 Release Notes