E Directory Structure for Oracle Database 10g Oracle Real Application Clusters Environments

This appendix describes the directory structures for Real Application Clusters (RAC) software environments. This appendix contains the following topics:

Understanding the Real Application Clusters Directory Structure
Directory Structures for Real Application Clusters

E.1 Understanding the Real Application Clusters Directory Structure

When you install Oracle Database 10g with RAC, all subdirectories are under a top-level ORACLE_BASE directory. The ORACLE_HOME and admin directories are also located under ORACLE_BASE.

E.2 Directory Structures for Real Application Clusters

Table E-1 shows the hierarchical directory tree of a sample optimal flexible architecture (OFA) compliant database for RAC:

Table E-1 Directory Structure for A Sample OFA-Compliant Environment

Root	Second-Level	Third-Level	Fourth-Level	Description
`$ORACLE_BASE`				`/u01/app/oracle` The default ORACLE_BASE directory.
	`ORACLE_HOME`			`/product/10.2.0` The default name of the Oracle home.
	`/admin`			The administrative directory.
		`/db_unique_name`		The database unique name; this is the same as `dbname` when the database name is 8 or fewer characters in length.
			`/bdump` `/cdump` `/hdump` `/pfile` `/udump`	The dump destinations for database server.
$CRS_home				`/u01/crs/oracle/product/10.2.0/app` The default name of the Oracle Clusterware home. After you install the software, you must change the permissions of all of the parent directories of the Oracle Clusterware home directory to grant write access only to the root user. Because of this, the Oracle Clusterware home directory must not be a subdirectory of the 10g Release 2 (10.2) Oracle base directory.
		/bin		The subtree for Oracle binaries.
		/network		The subtree for Oracle Net.