Oracle RMAN完全恢复案例（七）
案例7：
--利用增量备份进行恢复
1）建立增量备份
-------利用image 备份作为增量备份的0 级备份
RMAN> copy datafile 2 to '/disk1/rman/prod/users_%s.bak';
2）建立2 级差异备份
--------测试环境
08:05:52 SQL> conn scott/tiger
Connected.
08:05:58 SQL>
08:05:58 SQL> insert into emp1 select * from emp1;
4 rows created.
08:06:00 SQL> /
8 rows created.
08:06:01 SQL> commit;
Commit complete.
08:06:03 SQL>
RMAN> backup incremental level 2 format '/disk1/rman/prod/users_2_%s.bak' datafile 2;
RMAN> list backup of datafile 2;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
37 Incr 2 528.00K DISK 00:00:00 18-AUG-11
BP Key: 37 Status: AVAILABLE Compressed: NO Tag: TAG20110818T080650
Piece Name: /disk1/rman/prod/users_2_42.bak
List of Datafiles in backup set 37
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
2 2 Incr 1404665 18-AUG-11 /u01/app/oracle/oradata/prod/users01.dbf
3）建立 2级差异备份
08:06:03 SQL> insert into emp1 select * from emp1;
16 rows created.
08:07:49 SQL> /
32 rows created.
08:07:51 SQL> commit;
Commit complete.
08:07:53 SQL>
RMAN> backup incremental level 2 format '/disk1/rman/prod/users_2_%s.bak' datafile 2;
4）建立累计增量备份
08:07:53 SQL> insert into emp1 select * from emp1;
64 rows created.
08:08:55 SQL> /
128 rows created.
08:08:55 SQL> commit;
Commit complete.
08:08:57 SQL>
RMAN> backup incremental level 1 cumulative format '/disk1/rman/prod/users_1cu_%s.bak' datafile 2;
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
41 Incr 1 528.00K DISK 00:00:00 18-AUG-11
BP Key: 41 Status: AVAILABLE Compressed: NO Tag: TAG20110818T080942
Piece Name: /disk1/rman/prod/users_1cu_46.bak
List of Datafiles in backup set 41
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
2 1 Incr 1404815 18-AUG-11 /u01/app/oracle/oradata/prod/users01.dbf
--------------恢复
1）测试环境
08:08:57 SQL> select count(*) from emp1;
COUNT(*)
----------
256
08:10:33 SQL> shutdown abort
[oracle@work ~]$ rm /u01/app/oracle/oradata/prod/users01.dbf
2）启动数据库
08:10:52 SQL> startup
ORACLE instance started.
Total System Global Area 314572800 bytes
Fixed Size 1219184 bytes
Variable Size 79693200 bytes
Database Buffers 230686720 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 2 - see DBWR trace file
ORA-01110: data file 2: '/u01/app/oracle/oradata/prod/users01.dbf'
08:11:35 SQL> select file#,error from v$recover_file;
FILE# ERROR
---------- -----------------------------------------------------------------
2 FILE NOT FOUND
3）恢复数据文件
RMAN> run {
2> restore datafile 2;
3> recover datafile 2;
4> alter database open;
5> }
Starting restore at 18-AUG-11
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=154 devtype=DISK
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00002 to /u01/app/oracle/oradata/prod/users01.dbf ；先用0级restore
channel ORA_DISK_1: reading from backup piece /disk1/rman/prod/users_1cu_46.bak ；再用累积备份restore
channel ORA_DISK_1: restored backup piece 1
piece handle=/disk1/rman/prod/users_1cu_46.bak tag=TAG20110818T080942
channel ORA_DISK_1: restore complete, elapsed time: 00:00:04
Finished restore at 18-AUG-11
Starting recover at 18-AUG-11
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:02
Finished recover at 18-AUG-11
database opened
4）验证
08:14:01 SQL> select count(*) from scott.emp1;
COUNT(*)
----------
256
08:14:08 SQL>
----------------将数据文件恢复到新的位置
01:27:08 SQL> startup
ORACLE instance started.
Total System Global Area 440401920 bytes
Fixed Size 1219904 bytes
Variable Size 213910208 bytes
Database Buffers 222298112 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 7 - see DBWR trace file
ORA-01110: data file 7: '/u01/app/oracle/oradata/test/lxtbs2.dbf'
01:27:17 SQL> select file# ,error from v$recover_file;
FILE# ERROR
---------- -----------------------------------------------------------------
7 FILE NOT FOUND
01:27:25 SQL>
[oracle@work ~]$ rman target /
Recovery Manager: Release 10.2.0.1.0 - Production on Tue Oct 25 01:27:39 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: TEST (DBID=2062097024, not open)
run {
startup force mount;
set newname for datafile 7 to '/disk1/oradata/test/lxtbs2.dbf';
restore datafile 7;
switch datafile 7;
recover datafile 7;
alter database open;
8> }
Oracle instance started
database mounted
Total System Global Area 440401920 bytes
Fixed Size 1219904 bytes
Variable Size 213910208 bytes
Database Buffers 222298112 bytes
Redo Buffers 2973696 bytes
executing command: SET NEWNAME
Starting restore at 25-OCT-11
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=37 devtype=DISK
datafile 7 is already restored to file /disk1/oradata/test/lxtbs2.dbf
restore not done; all files readonly, offline, or already restored
Finished restore at 25-OCT-11
datafile 7 switched to datafile copy
input datafile copy recid=14 stamp=765423007 filename=/disk1/oradata/test/lxtbs2.dbf
Starting recover at 25-OCT-11
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:01
Finished recover at 25-OCT-11
database opened
RMAN>
oracle视频教程请关注:http://u.youku.com/user_video/id_UMzAzMjkxMjE2.html