HP Serviceguard Oracle DataGuard Toolkit User Guide, April 2011

NOTE: This configuration is supported both in single-instance and RAC environments. For better
understanding, the packages in the Figure 10 (page 17) are shown for a single-instance database.
Configuring multiple instances of Oracle Data Guard
To support configuring Multiple instances of ODG single-instance/RAC databases, in one
Serviceguard cluster, all the instances must be configured in such a way that they function
independently. This means that they should have different volume groups for storing the database
and redo logs. They should use different Oracle database listeners and IP addresses or ports.
Figure 11 Multiple Data Guard instances in one Serviceguard cluster
Figure 11 (page 18), shows a supported configuration where two two-node Serviceguard clusters
are configured to provide high availability to the Data Guard configurations. Two single-instance
Data Guard primary databases are configured in Cluster 1 and one standby database is configured
for each of the primary databases in Cluster 2. Note that both these clusters are independent of
each other and there cannot be a package failover between the two clusters. Both the primary
database in Cluster 1 and the standby database in Cluster 2, and their corresponding redo logs
are located on shared disks such that each can be accessed from any nodes in their respective
clusters. This will enable failover of the primary and standby packages within the cluster, thus
providing high availability for both of them.
NOTE: This configuration is supported both in single-instance and RAC environments. For better
understanding, the packages in the figure 11 are shown for a single-instance database.
Benefits of Oracle Data Guard toolkit in various configurations
ODG toolkit configurations has the following benefits:
• High availability for primary/secondary databases
• Automation of start/stop of databases
BenefitsOracle Data Guard toolkit configuration in
It uses only one Service Guard cluster. It stretches a Serviceguard
cluster across data centers up to 100 km apart and provides
protection against site outages
Extended Distance Cluster environment
It provides push button automated recovery for ODG databasesContinentalclusters environment
ODG databases can be configured for failover across two data
centers (which are up to 300 km apart) of the Metrocluster
Metrocluster environment
It provides data consistency of synchronous replication . It
protects against local and wide area disasters
Three Data Center configuration
18 Serviceguard support for Oracle Data Guard