Using Serviceguard Extension for RAC, 6th Edition, April 2008

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 25)).
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 the network and will perform a local LAN failover (transparent
to CSS and RAC) if the primary interface fails.
Cluster Communication Network Monitoring 47