DUPLICATE DATABASE TO dupdb
FOR STANDBY
FROM ACTIVE DATABASE
PASSWORD FILE
SPFILE PARAMETER_VALUE_CONVERT='/app/dbhome1','/app/db_home2'
SET db_file_name_convert='/app/dbhome1/dbs','/app/db_home2/database/dbs'
SET log_file_name_convert='/app/dbhome1/log','/app/db_home2/logfiles'
NOFILENAMECHECK;