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Perform the Pre-Installation Steps

Oracle RAC Cluster Tips by Burleson Consulting

This is an excerpt from the bestselling book Oracle Grid & Real Application Clusters.  To get immediate access to the code depot of working RAC scripts, buy it directly from the publisher and save more than 30%.

The pre-installation steps as documented in Software Installation, Database Creation and Configuration, in a previous chapter of this book should be followed. For example, on UNIX-based systems, this includes creating the Oracle user account and the DBA group on all nodes, setting up oracle user equivalence  with rsh and rlogin using rhost and hosts.equiv files, set the dbca_raw_config environment variable, if raw files are used, and so on. Shared storage can then be set up by referring to the Preparing Shared Storage section in an earlier chapter of this book.

Vendor manuals should be used to setup the shared disk array, RAID, and other shared disk requirements.

Setting Up the Cluster

If vendor supplied clusterware is in use, the vendor?s documentation on how to form a cluster with the required number of nodes should be followed. Once all of the nodes in the cluster have been configured, either with or without vendor clusterware, CRS must be installed by referring to the procedures in Software Installation, Database Creation and Configuration, from an earlier chapter in this book.  This process depend on the operating system.

Move the Preconfigured Database Image to the Install Target

This involves copying the database structure file and the database preconfigured image file that was created with the DBCA in the previous section.  The database structure file is copied to a holding location on the node in the cluster from which the DBCA will run to create the RAC database physical files.

Install the Oracle Database 10g RAC Software

The following procedure is followed to install the RAC software:

1. Run the Oracle Universal Installer (OUI) to perform an Oracle installation for the Oracle 10g Database software with RAC. If the CRS has not been installed, the RAC option will not be available

2. Select Cluster Installation Mode on the Specify Hardware Cluster Installation page of the Oracle Universal Installer (OUI) and select the nodes to utilize for the RAC database.

3. On the OUI Database Configuration Types page, select Advanced install. After installation of the Oracle software, the OUI automatically runs the post installation configuration tools such as the Network Configuration Assistant (NetCA) and the DBCA.

4. From the DBCA Template Selection screen, select the template that was copied to the temporary location in the previous section. Utilize the browse option to select the temporary location where the template files are located.

5. If raw storage is to be utilized, then on the DBCA File Locations Tab on the Initialization Parameters page, if the dbca_raw_config environment variable has not been set up,  replace the data files, control files, log files and so on, with the corresponding raw device files. Replace default database files with raw devices on the Storage page as well.

6. Once the RAC database is created, the DBCA utility displays the Password Management page. Use this page to change the passwords for privileged database users who have the SYSDBA and SYSOPER roles. Once the DBCA finishes, the conversion process is complete.

This method works because the template creation makes a compressed copy of the database datafiles. Transactions on the source database should not be allowed at this point or the RAC instances will not be in sync.


This is an excerpt from the bestselling book Oracle Grid & Real Application Clusters, Rampant TechPress, by Mike Ault and Madhu Tumma.

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts.


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