HP Serviceguard Toolkits for Database Replication Solutions User Guide, March 2012

start_script_timeout parameter in the package configuration should be appropriately
specified.
Restoring the cluster in a Continentalclusters to its original state is a manual process. The following
steps must be performed to restore the clusters to their original state:
1. Halt the recovery package — halts the recovery package
2. Resync primary database from the standby database.
3. Start the primary package— brings up the database on primary cluster as a primary database
4. Start the Data Receiver package— brings up the database on the recovery cluster as a standby
database
NOTE: In an RAC environment, the FAST_START_FAILOVER feature of ODG Broker must not be
enabled when using the ODG toolkit in Continentalclusters environment. When the ODG Broker
feature Fast Start Failover is enabled, it automatically changes the role of one of the available
standby database to “primary” role, if there is a disaster at the primary database site. Also, the
toolkit that performs role transitions in Continentalclusters environment might select a different
standby database for role change. This might lead to data integrity issues. Hence, FAST START
FAILOVER feature must be disabled in Continentalclusters environment.
Metrocluster and extended distance cluster environments
Metrocluster is an HP high availability product for Serviceguard customers who require integrated
disaster recovery solutions. HP Metrocluster uses Serviceguard clustering technology to form a
single cluster of systems that are located apart from each other at different data centers at
metropolitan distances.
While Metrocluster provides storage-based data replication across metropolitan distances,
organizations often like to build in additional data replicas, either locally or at other data centers.
When you perform both storage and ODG replication, it helps to safeguard customer data. ODG
protects against logical errors, while storage replication replicates any errors to the other replica.
For example, a dropped table.
The integration of ODG with Metrocluster or EDC gives organizations the choice to use storage
replication for Oracle and for all other application data.
The primary database can be configured inside a Metrocluster or an Extended Distance Cluster.
The standby database can be configured outside the Metrocluster/Extended Distance Cluster as
a standalone database or as part of a Serviceguard cluster.
For information about setting up Metrocluster, see Designing Disaster Recovery HA Clusters Using
Metrocluster and Continentalclusters Manual available at http://www.hp.com/go/
hpux-serviceguard-docs.
14 Serviceguard toolkit for Oracle Data Guard