Understand the groups and environment settings for the Oracle Real Application Clusters (Oracle RAC) installed configuration.

• Understanding the Configured Environment in Oracle RAC
  Oracle Net Configuration Assistant (NETCA) and Database Configuration Assistant (DBCA) configure your environment to meet the requirements for database creation and Oracle Enterprise Manager discovery of Oracle RAC databases.
• Understanding Operating System Privileges Groups
  Review this information for system privileges required for Oracle Database or Oracle Automatic Storage Management (Oracle ASM) administration.
• Understanding Time Zone Settings on Cluster Nodes
  Oracle RAC requires that all cluster nodes have the same time zone setting.
• Understanding the Server Parameter File for Oracle RAC
  When you create the database, Oracle Database creates an SPFILE in the file location that you specify. This location can be either an Oracle ASM disk group or a cluster file system.
• About ORATAB Configuration for Oracle RAC
  Oracle creates an entry for each Oracle RAC database in the oratab configuration file. The oratab file is created by the root.sh script during installation, and it is updated by the Database Configuration Assistant when creating or deleting a database.
• Database Components Created Using Database Configuration Assistant
  Understand the database components that DBCA creates.
• Managing Undo Tablespaces in Oracle RAC
  Oracle Database stores rollback or undo information in undo tablespaces. To manage undo tablespaces, Oracle recommends that you use Automatic Undo Management.
• About Initialization Parameter Files
  Oracle recommends using the server parameter file (SPFILE) for storing Oracle Database initialization parameters.
• Oracle Net Services Configuration for Oracle RAC Databases
  Users can access an Oracle RAC database using a client and server configuration or through one or more middle tiers, with or without connection pooling.
• Performance Features of Oracle Net Services and Oracle RAC
  Oracle RAC databases provide the important benefits of connection load balancing and failover.
• Oracle Net Services Configuration Files and Parameters
  If you use a naming method other than Easy Connect, then additional configuration of Oracle Net Services may be required.