Duplicate Database

1) On source database ORCLDB1, backup database with archivelog

Connect to RMAN

rman target sys/manager nocatalog

run
{
allocate channel c1 type disk;
backup database plus archivelog
format '/oracle/backup/orcldg1_%U.bck';
release channel c1;
}

2) On target database ORCLDB2, Run below script with duplicate database command

Connect to RMAN

rman target sys/oracle@ORCLDB1 auxiliary sys/oracle nocatalog

run
{
allocate auxiliary channel c1 type disk;
set newname for datafile 1 to '/oradata/db2/SYSTEM01.DBF';
set newname for datafile 2 to '/oradata/db2/UNDOTBS01.DBF';
set newname for datafile 3 to '/oradata/db2/SYSAUX01.DBF';
set newname for datafile 4 to '/oradata/db2/USERS01.DBF';
set newname for datafile 5 to '/oradata/db2/EXAMPLE01.DBF';
set newname for datafile 6 to '/oradata/db2/STRMTAB_01.DBF';
set newname for datafile 7 to '/oradata/db2/LOGMNRTST_01.DBF';
set newname for tempfile 1 to '/oradata/db2/TEMP01.DBF';
duplicate target database to ORCLDB2
logfile
group 1 ('/oradata/db2/redo1.log') size 200M reuse,
group 2 ('/oradata/db2/redo2.log') size 200M reuse,
group 3 ('/oradata/db2/redo3.log') size 200M reuse;
}