Recovery Manager (RMAN) automatic tablespace point-in-time recovery (commonly abbreviated TSPITR) enables you to quickly recover one or more tablespaces in an Oracle database to an earlier time, without affecting the state of the rest of the tablespaces and other objects in the database.for theoritical part please refer oracle documentation.
Here in this demo i am going to create and truncate a table in tablespace USERS for schema(username) RAJESH and recover truncated table TEST1 of users RAJESH schema in tablespace USERS.
We can use RMAN TSPITR in the following conditions
1. Recovering data lost after an erroneous TRUNCATE TABLE statement;
2. Recovering from logical corruption of a table;
3. Undoing the effects of an incorrect batch job or other DML statement that has affected only a subset of the database;
4. Recovering a logical schema to a point different from the rest of the physical database, when multiple schemas exist in separate tablespaces of one physical database.
SQL> select name from v$tablespace;
NAME
------------------------------
SYSTEM
UNDOTBS1
SYSAUX
USERS
TEMP
SQL> alter user rajesh identified by rajesh default tablespace users;
User altered.
SQL> conn rajesh/rajesh;
Connected.
SQL> create table test1(id number);
Table created.
SQL> insert into test1 values(123);
1 row created.
SQL> /
1 row created.
SQL> /
1 row created.
SQL> /
1 row created.
SQL> commit;
Commit complete.
SQL> select * from test1;
ID
----------
123
123
123
123
SQL>
[oracle@rac1 ~]$ . oraenv
ORACLE_SID = [cdbs1] ? rev1
[oracle@rac1 ~]$ rlrman target /
Recovery Manager: Release 10.2.0.1.0 - Production on Sun Oct 31 15:48:18 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: REV1 (DBID=1886963043)
RMAN> backup full database plus archivelog;
Starting backup at 31-OCT-10
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=153 devtype=DISK
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=18 recid=109 stamp=733321071
input archive log thread=1 sequence=19 recid=110 stamp=733321246
input archive log thread=1 sequence=20 recid=111 stamp=733321261
input archive log thread=1 sequence=21 recid=112 stamp=733351761
input archive log thread=1 sequence=22 recid=113 stamp=733351877
input archive log thread=1 sequence=23 recid=114 stamp=733851812
input archive log thread=1 sequence=24 recid=115 stamp=733851923
input archive log thread=1 sequence=25 recid=116 stamp=733852130
input archive log thread=1 sequence=26 recid=117 stamp=733852142
channel ORA_DISK_1: starting piece 1 at 31-OCT-10
channel ORA_DISK_1: finished piece 1 at 31-OCT-10
piece handle=/u01/app/oracle/backup/13lrrcfp_1_1 tag=TAG20101031T154911 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:05
Finished backup at 31-OCT-10
Starting backup at 31-OCT-10
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=/u01/app/oracle/oradata/rev1/system01.dbf
input datafile fno=00003 name=/u01/app/oracle/oradata/rev1/sysaux01.dbf
input datafile fno=00002 name=/u01/app/oracle/oradata/rev1/undotbs01.dbf
input datafile fno=00004 name=/u01/app/oracle/oradata/rev1/users01.dbf
channel ORA_DISK_1: starting piece 1 at 31-OCT-10
channel ORA_DISK_1: finished piece 1 at 31-OCT-10
piece handle=/u01/app/oracle/backup/14lrrcg2_1_1 tag=TAG20101031T154920 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:36
Finished backup at 31-OCT-10
Starting backup at 31-OCT-10
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=27 recid=118 stamp=733852258
channel ORA_DISK_1: starting piece 1 at 31-OCT-10
channel ORA_DISK_1: finished piece 1 at 31-OCT-10
piece handle=/u01/app/oracle/backup/15lrrcj4_1_1 tag=TAG20101031T155059 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02
Finished backup at 31-OCT-10
Starting Control File and SPFILE Autobackup at 31-OCT-10
piece handle=/u01/app/oracle/flash_recovery_area/REV1/autobackup/2010_10_31/o1_mf_s_733852263_6dtjrkts_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 31-OCT-10
RMAN> exit
Recovery Manager complete.
[oracle@rac1 ~]$
SQL> conn sys/oracle as sysdba;
Connected.
SQL> alter system switch logfile;
System altered.
SQL> create tablespace demo datafile '/u01/app/oracle/oradata/rev1/demo01.dbf' size 2m;
Tablespace created.
SQL> create user sai identified by sai default tablespace demo;
User created.
SQL> grant connect, resource to sai;
Grant succeeded.
SQL> conn sai/sai;
Connected.
SQL> create table test2(id number);
Table created.
SQL> insert into test2 values(555);
1 row created.
SQL> /
1 row created.
SQL> /
1 row created.
SQL> commit;
Commit complete.
SQL> select * from test2;
ID
----------
555
555
555
SQL> set time on;
15:54:48 SQL> conn rajesh/rajesh;
Connected.
15:54:57 SQL> select * from test1;
ID
----------
123
123
123
123
15:55:15 SQL> truncate table test1;
Table truncated.
15:55:26 SQL> select * from test1;
no rows selected
15:55:32 SQL>
15:55:32 SQL> conn sys/oracle as sysdba;
Connected.
15:59:30 SQL> col name format a51;
15:59:45 SQL> col status for a10;
15:59:51 SQL> select name,status from v$datafile;
NAME STATUS
--------------------------------------------------- ----------
/u01/app/oracle/oradata/rev1/system01.dbf SYSTEM
/u01/app/oracle/oradata/rev1/undotbs01.dbf ONLINE
/u01/app/oracle/oradata/rev1/sysaux01.dbf ONLINE
/u01/app/oracle/oradata/rev1/users01.dbf RECOVER
/u01/app/oracle/oradata/rev1/demo01.dbf ONLINE
16:00:08 SQL> conn sai/sai;
Connected.
16:00:55 SQL> create table test3(id number);
Table created.
16:01:08 SQL> insert into test3 values(666);
1 row created.
16:01:22 SQL> /
1 row created.
16:01:22 SQL> commit;
Commit complete.
16:01:25 SQL> select * from test3;
ID
----------
666
666
16:01:30 SQL>
[oracle@rac1 ~]$ . oraenv
ORACLE_SID = [rev1] ?
[oracle@rac1 ~]$ rlrman target /
Recovery Manager: Release 10.2.0.1.0 - Production on Sun Oct 31 15:56:19 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: REV1 (DBID=1886963043)
RMAN> recover tablespace USERS until time "to_date('31-OCT-2010 15:55:00','DD-MON-YYYY HH24:MI:SS')" AUXILIARY DESTINATION='/u01/app/oracle';
Starting recover at 31-OCT-10
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=136 devtype=DISK
RMAN-05026: WARNING: presuming following set of tablespaces applies to specified point in time
List of tablespaces expected to have UNDO segments
tablespace SYSTEM
tablespace UNDOTBS1
Creating automatic instance, with SID='huEl'
initialization parameters used for automatic instance:
db_name=REV1
compatible=10.2.0.1.0
db_block_size=8192
db_files=200
db_unique_name=tspitr_REV1_huEl
large_pool_size=1M
shared_pool_size=110M
#No auxiliary parameter file used
db_create_file_dest=/u01/app/oracle
control_files=/u01/app/oracle/cntrl_tspitr_REV1_huEl.f
starting up automatic instance REV1
Oracle instance started
Total System Global Area 201326592 bytes
Fixed Size 1218508 bytes
Variable Size 146802740 bytes
Database Buffers 50331648 bytes
Redo Buffers 2973696 bytes
Automatic instance created
contents of Memory Script:
{
# set the until clause
set until time "to_date('31-OCT-2010 15:55:00','DD-MON-YYYY HH24:MI:SS')";
# restore the controlfile
restore clone controlfile;
# mount the controlfile
sql clone 'alter database mount clone database';
# archive current online log for tspitr to a resent until time
sql 'alter system archive log current';
# avoid unnecessary autobackups for structural changes during TSPITR
sql 'begin dbms_backup_restore.AutoBackupFlag(FALSE); end;';
}
executing Memory Script
executing command: SET until clause
Starting restore at 31-OCT-10
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=36 devtype=DISK
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: reading from backup piece /u01/app/oracle/flash_recovery_area/REV1/autobackup/2010_10_31/o1_mf_s_733852408_6dtjx0yz_.bkp
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u01/app/oracle/flash_recovery_area/REV1/autobackup/2010_10_31/o1_mf_s_733852408_6dtjx0yz_.bkp tag=TAG20101031T155328
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:04
output filename=/u01/app/oracle/cntrl_tspitr_REV1_huEl.f
Finished restore at 31-OCT-10
sql statement: alter database mount clone database
sql statement: alter system archive log current
sql statement: begin dbms_backup_restore.AutoBackupFlag(FALSE); end;
released channel: ORA_DISK_1
released channel: ORA_AUX_DISK_1
contents of Memory Script:
{
# generated tablespace point-in-time recovery script
# set the until clause
set until time "to_date('31-OCT-2010 15:55:00','DD-MON-YYYY HH24:MI:SS')";
plsql <<<-- tspitr_2
declare
sqlstatement varchar2(512);
offline_not_needed exception;
pragma exception_init(offline_not_needed, -01539);
begin
sqlstatement := 'alter tablespace '|| 'USERS' ||' offline for recover';
krmicd.writeMsg(6162, sqlstatement);
krmicd.execSql(sqlstatement);
exception
when offline_not_needed then
null;
end; >>>;
# set an omf destination filename for restore
set newname for clone datafile 1 to new;
# set an omf destination filename for restore
set newname for clone datafile 2 to new;
# set an omf destination tempfile
set newname for clone tempfile 1 to new;
# set a destination filename for restore
set newname for datafile 4 to
"/u01/app/oracle/oradata/rev1/users01.dbf";
# rename all tempfiles
switch clone tempfile all;
# restore the tablespaces in the recovery set plus the auxilliary tablespaces
restore clone datafile 1, 2, 4;
switch clone datafile all;
#online the datafiles restored or flipped
sql clone "alter database datafile 1 online";
#online the datafiles restored or flipped
sql clone "alter database datafile 2 online";
#online the datafiles restored or flipped
sql clone "alter database datafile 4 online";
# make the controlfile point at the restored datafiles, then recover them
recover clone database tablespace "USERS", "SYSTEM", "UNDOTBS1" delete archivelog;
alter clone database open resetlogs;
# PLUG HERE the creation of a temporary tablespace if export fails due to lack
# of temporary space.
# For example in Unix these two lines would do that:
#sql clone "create tablespace aux_tspitr_tmp
# datafile ''/tmp/aux_tspitr_tmp.dbf'' size 500K";
}
executing Memory Script
executing command: SET until clause
sql statement: alter tablespace USERS offline for recover
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
renamed temporary file 1 to /u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_temp_%u_.tmp in control file
Starting restore at 31-OCT-10
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=40 devtype=DISK
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_system_%u_.dbf
restoring datafile 00002 to /u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_undotbs1_%u_.dbf
restoring datafile 00004 to /u01/app/oracle/oradata/rev1/users01.dbf
channel ORA_AUX_DISK_1: reading from backup piece /u01/app/oracle/backup/14lrrcg2_1_1
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/u01/app/oracle/backup/14lrrcg2_1_1 tag=TAG20101031T154920
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:17
Finished restore at 31-OCT-10
datafile 1 switched to datafile copy
input datafile copy recid=17 stamp=733852877 filename=/u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_system_6dtk9896_.dbf
datafile 2 switched to datafile copy
input datafile copy recid=18 stamp=733852877 filename=/u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_undotbs1_6dtk98by_.dbf
sql statement: alter database datafile 1 online
sql statement: alter database datafile 2 online
sql statement: alter database datafile 4 online
Starting recover at 31-OCT-10
using channel ORA_AUX_DISK_1
starting media recovery
archive log thread 1 sequence 27 is already on disk as file /u01/app/oracle/flash_recovery_area/REV1/archivelog/2010_10_31/o1_mf_1_27_6dtjrbnj_.arc
archive log thread 1 sequence 28 is already on disk as file /u01/app/oracle/flash_recovery_area/REV1/archivelog/2010_10_31/o1_mf_1_28_6dtk80s9_.arc
archive log filename=/u01/app/oracle/flash_recovery_area/REV1/archivelog/2010_10_31/o1_mf_1_27_6dtjrbnj_.arc thread=1 sequence=27
archive log filename=/u01/app/oracle/flash_recovery_area/REV1/archivelog/2010_10_31/o1_mf_1_28_6dtk80s9_.arc thread=1 sequence=28
media recovery complete, elapsed time: 00:00:03
Finished recover at 31-OCT-10
database opened
contents of Memory Script:
{
# export the tablespaces in the recovery set
host 'exp userid =\"/@\(DESCRIPTION=\(ADDRESS=\(PROTOCOL=beq\)\(PROGRAM=/u01/app/oracle/product/10.2.0/db_1/bin/oracle\)\(ARGV0=oraclehuEl\)\(ARGS=^'\(DESCRIPTION=\(LOCAL=YES\)\(ADDRESS=\(PROTOCOL=beq\)\)\)^'\)\(ENVS=^'ORACLE_SID=huEl^'\)\)\(CONNECT_DATA=\(SID=huEl\)\)\) as sysdba\" point_in_time_recover=y tablespaces= USERS file=
tspitr_a.dmp';
# shutdown clone before import
shutdown clone immediate
# import the tablespaces in the recovery set
host 'imp userid =\"/@ as sysdba\" point_in_time_recover=y file=
tspitr_a.dmp';
# online/offline the tablespace imported
sql "alter tablespace USERS online";
sql "alter tablespace USERS offline";
# enable autobackups in case user does open resetlogs from RMAN after TSPITR
sql 'begin dbms_backup_restore.AutoBackupFlag(TRUE); end;';
}
executing Memory Script
Export: Release 10.2.0.1.0 - Production on Sun Oct 31 16:02:07 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning and OLAP options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)
Note: table data (rows) will not be exported
About to export Tablespace Point-in-time Recovery objects...
For tablespace USERS ...
. exporting cluster definitions
. exporting table definitions
. . exporting table A
EXP-00091: Exporting questionable statistics.
. . exporting table NEW
EXP-00091: Exporting questionable statistics.
. . exporting table TEST1
. exporting referential integrity constraints
. exporting triggers
. end point-in-time recovery
Export terminated successfully with warnings.
host command complete
database closed
database dismounted
Oracle instance shut down
Import: Release 10.2.0.1.0 - Production on Sun Oct 31 16:02:54 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning and OLAP options
Export file created by EXPORT:V10.02.01 via conventional path
About to import Tablespace Point-in-time Recovery objects...
import done in US7ASCII character set and AL16UTF16 NCHAR character set
import server uses WE8ISO8859P1 character set (possible charset conversion)
. importing SYS's objects into SYS
. importing SCOTT's objects into SCOTT
. . importing table "A"
. importing RAJESH's objects into RAJESH
. . importing table "NEW"
. . importing table "TEST1"
. importing SYS's objects into SYS
Import terminated successfully without warnings.
host command complete
sql statement: alter tablespace USERS online
sql statement: alter tablespace USERS offline
sql statement: begin dbms_backup_restore.AutoBackupFlag(TRUE); end;
Removing automatic instance
Automatic instance removed
auxiliary instance file /u01/app/oracle/cntrl_tspitr_REV1_huEl.f deleted
auxiliary instance file /u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_system_6dtk9896_.dbf deleted
auxiliary instance file /u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_undotbs1_6dtk98by_.dbf deleted
auxiliary instance file /u01/app/oracle/TSPITR_REV1_HUEL/datafile/o1_mf_temp_6dtkdg6g_.tmp deleted
auxiliary instance file /u01/app/oracle/TSPITR_REV1_HUEL/onlinelog/o1_mf_1_6dtkd95j_.log deleted
auxiliary instance file /u01/app/oracle/TSPITR_REV1_HUEL/onlinelog/o1_mf_2_6dtkdbmb_.log deleted
auxiliary instance file /u01/app/oracle/TSPITR_REV1_HUEL/onlinelog/o1_mf_3_6dtkdbrn_.log deleted
Finished recover at 31-OCT-10
RMAN>
16:03:06 SQL> select name,status from v$datafile;
NAME STATUS
--------------------------------------------------- ----------
/u01/app/oracle/oradata/rev1/system01.dbf SYSTEM
/u01/app/oracle/oradata/rev1/undotbs01.dbf ONLINE
/u01/app/oracle/oradata/rev1/sysaux01.dbf ONLINE
/u01/app/oracle/oradata/rev1/users01.dbf OFFLINE
/u01/app/oracle/oradata/rev1/demo01.dbf ONLINE
16:03:06 SQL> select name,status from v$datafile;
NAME STATUS
--------------------------------------------------- ----------
/u01/app/oracle/oradata/rev1/system01.dbf SYSTEM
/u01/app/oracle/oradata/rev1/undotbs01.dbf ONLINE
/u01/app/oracle/oradata/rev1/sysaux01.dbf ONLINE
/u01/app/oracle/oradata/rev1/users01.dbf OFFLINE
/u01/app/oracle/oradata/rev1/demo01.dbf ONLINE
16:03:45 SQL> conn rajesh/rajesh;
Connected.
16:05:26 SQL> select * from test1;
select * from test1
*
ERROR at line 1:
ORA-00376: file 4 cannot be read at this time
ORA-01110: data file 4: '/u01/app/oracle/oradata/rev1/users01.dbf'
16:05:32 SQL> conn sys/oracle as sysdba;
Connected.
16:05:42 SQL> alter tablespace users online;
Tablespace altered.
16:05:52 SQL> conn rajesh/rajesh;
Connected.
16:05:58 SQL> select * from test1;
ID
----------
123
123
123
123
16:06:05 SQL> conn sai/sai;
Connected.
16:06:11 SQL> select * from test2;
ID
----------
555
555
555
16:06:16 SQL> select * from test3;
ID
----------
666
666
16:06:20 SQL> conn sys/oracle as sysdba;
Connected.
16:06:32 SQL> select name,status from v$datafile;
NAME STATUS
--------------------------------------------------- ----------
/u01/app/oracle/oradata/rev1/system01.dbf SYSTEM
/u01/app/oracle/oradata/rev1/undotbs01.dbf ONLINE
/u01/app/oracle/oradata/rev1/sysaux01.dbf ONLINE
/u01/app/oracle/oradata/rev1/users01.dbf ONLINE
/u01/app/oracle/oradata/rev1/demo01.dbf ONLINE
16:06:38 SQL>
hope, this will helps you.
reference:
http://download.oracle.com/docs/cd/B14117_01/server.101/b10734/rcmtspit.htm
