full database refresh using conventional export/import

backup the source database and restore it in the destination database

take backup of source database

use below parameters

full=y
file=dumpfilename
log=logfilename
consistent=y
buffer=1024000
statistics=none
compress=n


scp the dump file from source to destination server

In the destination database, you need to have space in both the filesystem and the database. In the filesystem, it is enough if you have 1/3 rd or may be 1/4 th of the total source database size as it is only the raw data that resides in the filesystem.

Note down the datafile locations for the tablespaces

remove all the non default users, roles, profiles and the non-default tablespaces including the contents and datafiles.

remove the datafiles physically.

create the tablespaces from the source database

create roles and profiles

create users

vi imp.par
-----------
file=dumpfile
full=y
buffer=1024000
log=logfile
statistics=none
ignore=y
commit=y