About Oracle Base Home

In a read-only ORACLE_HOME the user-specific files, instance-specific files, and log files reside in a location known as the ORACLE_BASE_HOME.

Starting with Oracle Database 21c, the only available configuration is a read-only ORACLE_HOME where ORACLE_BASE_HOME and ORACLE_BASE_CONFIG are located separately from ORACLE_HOME.

In a read-only ORACLE_HOME, the ORACLE_BASE_HOME directory is not co-located with ORACLE_HOME but is located at ORACLE_BASE/homes/HOME_NAME. Where, HOME_NAME is the internal name for ORACLE_HOME.

For example, the networking directories network/admin, network/trace, and network/log are located in the ORACLE_BASE_HOME directory. In a read-only ORACLE_HOME the networking directories are located in ORACLE_BASE/homes/HOME_NAME.

To print the ORACLE_BASE_HOME path, run the orabasehome command from the $ORACLE_HOME/bin directory:

$ setenv ORACLE_HOME /u01/app/oracle/product/21.0.0/dbhome_1
$ cd $ORACLE_HOME/bin
$ ./orabasehome

For example:

$ ./orabasehome
/u01/app/oracle/homes/OraDB21Home1

Where, /u01/app/oracle is ORACLE_BASE and OraDB21Home1 is HOME_NAME

Parent topic: Evolution of Oracle Homes