POINT IN TIME RECOVERY via RMAN

Scenario:


DBA dropped the tablespace TEST which is important for application.


Requirement:

We need to restore the database before the TEST tablespace was dropped.

Solution:

SQL> drop tablespace test including contents and datafiles;

Tablespace dropped.

DBA realized the mistake;

He will refer alert log for the exact timing when tablespace was dropped.

Alert log

Sun Feb 4 10:59:43 2007
drop tablespace test including contents and datafiles
Sun Feb 4 10:59:47 2007
Completed: drop tablespace test including contents and datafiles


SQL> shutdown abort
ORACLE instance shut down.


rman target / catalog rman/cat@risl64

Recovery Manager: Release 10.2.0.2.0 - Production on Sun Feb 4 11:02:48 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to target database (not started)
Connected to recovery catalog database


RMAN> run

{

startup nomount

set until time "to_date ('04-02-07 10:58:00', 'DD-MM-YY HH24:MI:SS')";

restore controlfile;

alter database mount;

restore database;

recover database;

alter database open resetlogs;

}

Oracle instance started

Total System Global Area 268435456 bytes

Fixed Size 2070448 bytes

Variable Size 104859728 bytes

Database Buffers 155189248 bytes

Redo Buffers 6316032 bytes

executing command: SET until clause

Starting restore at 04-FEB-07

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=157 devtype=DISK

channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: reading from backup piece /u01/ORACLE/ocm/c-1996161442-20070204-04
channel ORA_DISK_1: restored backup piece 1
piece handle=/u01/ORACLE/ocm/c-1996161442-20070204-04 tag=TAG20070204T105219
channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
output filename=/u01/ORACLE/ocm/control01.ctl
output filename=/u01/ORACLE/ocm/control02.ctl
output filename=/u01/ORACLE/ocm/control03.ctl
Finished restore at 04-FEB-07


database mounted

released channel: ORA_DISK_1
Starting restore at 04-FEB-07

Starting implicit crosscheck backup at 04-FEB-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=157 devtype=DISK
Crosschecked 18 objects
Finished implicit crosscheck backup at 04-FEB-07
Starting implicit crosscheck copy at 04-FEB-07
using channel ORA_DISK_1
Finished implicit crosscheck copy at 04-FEB-07
searching for all files in the recovery area
cataloging files...
no files cataloged
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/ORACLE/ocm/system01.dbf
restoring datafile 00002 to /u01/ORACLE/ocm/undotbs01.dbf
restoring datafile 00003 to /u01/ORACLE/ocm/sysaux01.dbf
restoring datafile 00004 to /u01/ORACLE/ocm/users01.dbf
restoring datafile 00005 to /u01/ORACLE/ocm/test.dbf
channel ORA_DISK_1: reading from backup piece /u01/ORACLE/ocm/1ni975e6_1_1
channel ORA_DISK_1: restored backup piece 1
piece handle=/u01/ORACLE/ocm/1ni975e6_1_1 tag=TAG20070204T105150
channel ORA_DISK_1: restore complete, elapsed time: 00:00:17
Finished restore at 04-FEB-07

Starting recover at 04-FEB-07
using channel ORA_DISK_1
starting media recovery

archive log thread 1 sequence 19 is already on disk as file /u01/ORACLE/ocm/OCM/archivelog/2007_02_04/o1_mf_1_19_2wc0nztc_.arc

archive log thread 1 sequence 20 is already on disk as file /u01/ORACLE/ocm/redo02.log

archive log filename=/u01/ORACLE/ocm/OCM/archivelog/2007_02_04/o1_mf_1_19_2wc0nztc_.arc thread=1 sequence=19

archive log filename=/u01/ORACLE/ocm/redo02.log thread=1 sequence=20
media recovery complete, elapsed time: 00:00:00
Finished recover at 04-FEB-07


database opened

new incarnation of database registered in recovery catalog

starting full resync of recovery catalog

full resync complete

RMAN>

SQL> select name from v$tablespace;
NAME
------------------------------

SYSTEM
UNDOTBS1
SYSAUX
USERS
TEMP
TEST
6 rows selected.