B Directory Structure for Oracle RAC Environments

After you install the software, there are several directory structures for Oracle Real Application Clusters (Oracle RAC).

B.1 Understanding the Oracle RAC Directory Structure

When you install Oracle Database 12c Release 1 (12.1) with Oracle RAC, several directory structures are created.

All subdirectories except for the Oracle Inventory directory, the Oracle Automatic Storage Management (Oracle ASM) home (if applicable), and the Oracle Clusterware home, are under a top-level Oracle base directory. The Oracle home and admin directories are also located under the Oracle base directory.

See Also:

Oracle Database Installation Guide for Microsoft Windows for more information about the Oracle home and admin directories

B.2 Directory Structures for Oracle RAC

The sample Optimal Flexible Architecture (OFA)-compliant database has a hierarchical directory tree of folders.

Table B-1 Directory Structure for a Sample OFA-Compliant Environment

Directory Description

The default ORACLE_BASE directory, where the software was installed by the Oracle Installation user


The type of installation under the Oracle base directory. For example, when installing Oracle Database 12c Release 1 (12.1), the value for installation type is product\12.1.0\db.


The location in which the Oracle Database software is installed. You can also choose to add a counter, if you have multiple installations of the software. For example, if you are creating a second Oracle home for the Oracle Database 11g release 2 software, then the path is as follows:


Note that the Oracle database home is under the Oracle base directory path. An Oracle Clusterware directory must not be under the Oracle base directory path where the database executable files are located.


The directory in which the local initialization parameter file is stored for the database.


The administrative directory. Note that with Oracle Database 11g and later releases, bdump, cdump, and udump files are relocated to the directory associated with %ADR_BASE%.


The database unique name; this is the same as dbname when the database name is 8 or fewer characters in length. For example, if your database name is sales, the directory path is:


The dump destinations for the database server.


This directory path is set by the initialization parameter DIAGNOSTIC_DEST, and the path for the Automatic Diagnostic Repository must be located on a shared storage location available to all the nodes.

By default, this path is a subset of the Oracle base directory, in the following path:


Automatic Diagnostic Repository dump destination trace files.

Oracle Grid Infrastructure for a cluster home (Grid home)

An OFA-compliant path for the Oracle Clusterware home. The default value is:


During the Oracle Grid Infrastructure for a cluster installation, Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) software is installed.


The subtree for Oracle Clusterware and Oracle ASM executable files.


The subtree for Oracle Net Services configuration files and utilities.