Using Serviceguard Extension for RAC, 7th Edition, September 2008

The SGeRAC Toolkit uses Serviceguard/SGeRAC version A.11.17 (or later) multi-node packages
and package dependency features to provide a uniform, intuitive, and easy-to-manage method
to co-ordinate between SGeRAC and Oracle Clusterware.
Additionally, the SGeRAC Toolkit helps to manage all the storage options supported by SGeRAC;
CFS, SLVM, CVM, ASM (over SLVM), and SGeRAC support ASM over the raw device files on
HP-UX 11i v3 only. For more information, refer to the Serviceguard Extension for RAC Version
A.11.18 Release Notes located at http://docs.hp.com -> High Availability -> Serviceguard
Extension for Real Application Clusters -> Release Notes.
Configuration File Parameters
You need to code specific entries for all the storage groups that you want to use in an Oracle
RAC configuration. If you are using LVM, the OPS_VOLUME_GROUP parameter is included in
the cluster ASCII file. If you are using Veritas CVM, the STORAGE_GROUP parameter is included
in the package ASCII file. Details are as follows:
OPS_VOLUME_GROUP
The name of an LVM volume group whose disks are attached to at
least two nodes in the cluster; the disks will be accessed by more than
one node at a time using SLVM with concurrency control provided by
Oracle RAC. Such disks are considered cluster aware.
Volume groups listed under this parameter are marked for activation
in shared mode. The entry can contain up to 40 characters.
STORAGE_GROUP
This parameter is used for CVM disk groups. Enter the names of all
the CVM disk groups the package will use.
In the ASCII package configuration file, this parameter is called
STORAGE_GROUP.
Unlike LVM volume groups, CVM disk groups are not entered in the cluster configuration file,
they are entered in the package configuration file.
NOTE: CVM 4.x or later with CFS does not use the STORAGE_GROUP parameter because the
disk group activation is performed by the multi-node package. CVM 3.x or 4.x and later without
CFS uses the STORAGE_GROUP parameter in the ASCII package configuration file in order to
activate the disk group (on HP-UX releases that support Veritas CFS and CVM; see “About
Veritas CFS and CVM from Symantec” (page 18)).
Do not enter the names of LVM volume groups or VxVM disk groups in the package ASCII
configuration file.
Cluster Communication Network Monitoring
This section describes the various network configurations for cluster communications in a
SGeRAC/10g RAC cluster, and how the package configuration parameter
CLUSTER_INTERCONNECT_SUBNET can be used to recover from Oracle cluster communications
network failures in certain configurations.
Single Network for Cluster Communications
The single network configuration is the most common configuration for network installations.
In this configuration, there is sufficient bandwidth for all cluster communications traffic to go
through one network. If there are multiple databases, all database traffic goes through the same
network.
As shown in Figure 2-1, both CSS-HB and SG-HB are on the same network. The primary and
standby interface pair protects against a single network interface failure. Serviceguard monitors
36 Serviceguard Configuration for Oracle 10g RAC