# Initialization parameters on Primary DB
...
*.db_name='compdb'
*.db_unique_name='primdb'
...
# Initialization parameters on Standby DB
...
*.db_name='compdb'
*.db_unique_name='standb'
...
As we can expect, the first instance of the standby RAC database will be standb1, and the other will be standb2.
During the installation, please use the same $GRID_BASE, $GRID_HOME, $ORACLE_BASE, $ORACLE_HOME and diskgroup name with the primary database to maintain the same structure on both sides.