From RMAN?

Question

Hi Gurus,
Regarding recovery:
User managed:
If a datafile lost then we copy manually only that lost datafile and use recover command.
RMAN:
Instead of manual copy the RMAN itself do it.
This is my question, Suppose we have full backup with RMAN, if there is a datafile lost or corrupted then we run this command
Rman> restore database;
Now, what action the RMAN will do, is it copy back entire datafiles? Or it copy only lost or corrupted datafile, or it copy the corrupted portion/data blocks only?
Thanks

Answer 1

Hi,
once you rman>restore database; It will all the datafiles from the backup and even the control file too. But, after that you need to give alter database mount and find out the location of present archive log files that has been generated and start applying those archive log files to the database.
sql>startup mount
sql>recover database until cancel using backup controlfile;
It will ask for the location of the archive log files,
give the archive log files location : '/u1/oracle/arch/arch1.arc'
then
sql>alter database open resetlogs;
sql>alter database open;
Then don't forget to create a temp tablespace or add datafile to temp tablespace
query v$tempfile
dba_data_files
and query dba_users, to find out which tablespaces and users are assigned the temp tablespace.
then shutdown and startup.
Its done.