Welcome to Database Configuration Assistant (DBCA).
After you install the Oracle Database software, you can use DBCA to create and configure your databases. The welcome page allows you to select the database type that you would like to create or administer from three options:
RAC One Node databases are RAC databases that run in a cluster but usually just run one instance. Only during planned online database relocation operations is a second instance started so that the sessions can be migrated to a new node. The original instance is then shut down. RAC One Node databases can also fail over to another cluster node within its hosting server pool if their current node fails. DBCA allows users to create a RAC One Node database as either an Admin Managed database or a Policy Managed database.
DBCA guides you through the process of creating a new database, changing the configuration of an existing database, or deleting a database. Many of the database creation tasks you would normally perform manually are performed automatically after you select your database options with DBCA.
With DBCA you can select from a list of pre-defined database templates, or you can use an existing database as a sample for creating a template.
Note: Oracle recommends that you close other applications when running DBCA.
Before DBCA can create an Oracle RAC database, you must complete the preinstallation tasks, and you must have completed the two-phase installation process for installing Oracle Clusterware and the Oracle Enterprise Edition 11g with Oracle RAC.
In addition, depending upon the type of database storage that you use, you should perform one of the following setup procedures before running DBCA to create an Oracle RAC database.
Set up raw disks on shared storage and use Automatic Storage Management (ASM) for database storage. Use ASMCA for creating and configuring ASM.
If your platform supports a cluster file system, then you can use a cluster file system partition for database storage.
Check if the default listener is running from the Grid Infrastructure home, if not use NETCA to configure the default listener.
For more information about configuring your disks, refer to the preinstallation procedures as described in your platform-specific Oracle Clusterware installation and configuration guide.
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