Using Serviceguard Extension for RAC Version A.11.20 - (August 2011)

Limitations of cDSFs
• cDSFs are supported only within a single cluster; you cannot define a cDSF group that crosses
cluster boundaries.
• A node can belong to only one cDSF group.
• cDSFs are not supported by CVM, CFS, or any other application that assumes DSFs reside
only in /dev/disk and /dev/rdisk.
• cDSFs do not support disk partitions.
Such partitions can be addressed by a device file using the agile addressing scheme, but not
by a cDSF.
For more information about Cluster-wide Device Special Files (cDSFs), see the Managing
Serviceguard, Eighteenth Edition manual at www.hp.com/go/hpux-serviceguard-docs —>
HP Serviceguard .
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 5.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 5.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 15).
Do not enter the names of LVM volume groups in the package ASCII configuration file.
Cluster Communication Network Monitoring
This section describes the various network configurations for cluster communications in
SGeRAC/10g/11gR1/11gR2 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.
Support for the Oracle Grid Infrastructure 11.2.0.2 HAIP with SGeRAC A.11.20
The following network configuration requirements must be met to use the Oracle Grid Infrastructure
11.2.0.2 HAIP feature in an SGeRAC cluster:
1. Any networks in the SGeRAC A.11.20 cluster configured for heartbeat must also be configured
as Oracle cluster interconnect network in the Oracle Grid Infrastructure 11.2.0.2. Similarly
Configuration File Parameters 35