Database Migration/Move with RMAN: Are you sure nothing is missing?

Forced by the destiny to make a migration using backup/restore (with a little downtime), how to be sure nothing will be lost during the migration?
Here is a way: Create your own data just before migrating. 🙂

Seems like a kludge and it is.. haha.. But it works. Take a look:

# Original Database

SQL> shu immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup restrict;
ORACLE instance started.
Total System Global Area 2689060864 bytes
Fixed Size 2229520 bytes
Variable Size 1996491504 bytes
Database Buffers 671088640 bytes
Redo Buffers 19251200 bytes
Database mounted.
Database opened.
SQL> create table matheus_boesing.migration (text varchar2(10));
Table created.
SQL> insert into matheus_boesing.migration values ('well done!');
1 row created.
SQL> commit;
Commit complete.
SQL> alter system switch logfile;
System altered.
SQL> /
System altered.
SQL> /
System altered.
SQL> /
System altered.
SQL> /
System altered.
SQL> /
System altered.
SQL> shu immediate;
SQL> exit;
$ rman target /
connect catalog rman_mydb/password@catalogdb
run { backup archivelog all;}

# Destination Database

$ rman target /
connect catalog rman_mydb/password@catalogdb
run { recover database;}
$ sqlplus / as sysdba
SQL> select count(1), to_char(CHECKPOINT_TIME, 'DD/MM/YYYY HH24:MI:SS') from V$DATAFILE_HEADER t
group by to_char(CHECKPOINT_TIME, 'DD/MM/YYYY HH24:MI:SS') order by 2;
COUNT(1) TO_CHAR(CHECKPOINT_
---------- -------------------
51 27/06/2015 22:15:28
-- All datafiles with synchronized headers...
SQL> alter database open read only; 
-- If needed, you can do more recover, this way...
Database altered.
SQL> select * from matheus_boesing.migration;
TEXT
----------
well done!
-- Means no more recover is needed :)
SQL> shutdown immediate;
SQL> alter database open resetlogs;
Database altered.

And be Happy! 😀

Matheus.

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