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Oracle service group

You can configure VCS to support starting, stopping, and monitoring Oracle databases automatically. A database is configured in a VCS service group. Just as one instance of a database runs per machine, one instance of a parallel VCS service group runs per machine.

Oracle service group dependencies

The Oracle service group has an online local firm dependency on the cvm service group:

• The Oracle instance cannot start until the Oracle binary disk group is imported and the file system is mounted.
• If the IP address and listener process are not available, clients cannot access the database.
• If the cvm service group faults, the Oracle service group comes offline.

Service groups in an SF Oracle RAC environment typically have an online local firm dependency configuration to ensure that the infrastructure for Oracle RAC is online before the database starts.

In an online local dependency, a child service group must be online on a node before a parent service group can come online on the same node. The parent group is taken offline when the child group faults. If the parent service group faults, the child service group continues to run.

Configuring the Oracle service group

Configuring the Oracle service group involves these tools:

• Command-line interface. For example, type:

  haconf makerw

  hagrp -add oradatadg

  hagrp -modify oradatadg Parallel 1

  hagrp -modify oradatadg SystemList S1 0 S2 1

  hagrp -modify oradatadg AutoStartList S1 S2

  haconf -dump -makero

• Graphical user interface
• Wizard: /opt/VRTSvcs/bin/hawizard rac.
• Manual modification of main.cf