探索ORACLE之RMAN_04非一致性备份

来源：互联网发布：用户画像数据来源编辑：程序博客网时间：2024/06/05 13:40

作者：吴伟龙

在上一篇博文中提到了数据库的一致性备份，操作非常的简单。只需要一条很短的命令即可完成，但是如果要创建一正式库的备份，一般不建议用一致性备份，也不建议用很简单的名来完成。而是更多的采用脚本实现非一致性备份，这样将可通过backup+archive log+redo有效的将数据恢复到最近一次改变的状态，可以达到数据的丢失最小化。

创建非一致性备份

创建非一致性备份数据库必须处于归档(archivelog)模式，因为非一致性备份的数据库文件和控制文件的SCN号可能会不一致。并且可以在数据库打开并不影响业务的情况下完成数据的备份工作；那么这样的备份将是不一致性的备份，那么如果要恢复可以通过backup+archive log+redo来恢复到最近一次日志切换时候的数据，而不是最后一次备份时候的数据。

1.1检查归档状态：

SQL> archive log list;

Database log mode No Archive Mode

Automaticarchival Disabled

Archivedestination USE_DB_RECOVERY_FILE_DEST

Oldest onlinelog sequence 9

Current logsequence 11

SQL>

必须打开归档归档

SQL> shutdown immediate -----打开归档必须将数据库重启到mount状态

Databaseclosed.

Databasedismounted.

ORACLE instanceshut down.

SQL> startup mount;

ORACLE instancestarted.

Total SystemGlobal Area 285212672 bytes

Fixed Size 1218968 bytes

VariableSize 79693416 bytes

DatabaseBuffers 197132288 bytes

RedoBuffers 7168000 bytes

Databasemounted.

SQL> alter database archivelog; ----执行开启归档命令

Databasealtered.

SQL> alter database open; -----打开数据库

Databasealtered.

SQL> colinstance_name format a15

SQL> select instance_name,status from v$instance; ----查看数据库状态

INSTANCE_NAME STATUS

---------------------------------------

WWL OPEN

SQL>

SQL> archive log list; ------查看归档状态，已经是归档状态了

Database log mode Archive Mode

Automatic archival Enabled

Archivedestination USE_DB_RECOVERY_FILE_DEST

Oldest onlinelog sequence 9

Next logsequence to archive 11

Current logsequence 11

SQL>

1.2执行备份 (执行备份命令实际上是跟一致性备份是一样的)

1.2.1 备份数据库

RMAN> backup database;

Starting backupat 23-MAY-12

allocatedchannel: ORA_DISK_1

channelORA_DISK_1: sid=145 devtype=DISK

channelORA_DISK_1: starting full datafile backupset

channelORA_DISK_1: specifying datafile(s) in backupset

input datafilefno=00001 name=/DBData/WWL/system01.dbf

input datafilefno=00003 name=/DBData/WWL/sysaux01.dbf

input datafilefno=00002 name=/DBData/WWL/undotbs01.dbf

input datafilefno=00004 name=/DBData/WWL/users01.dbf

channelORA_DISK_1: starting piece 1 at 23-MAY-12

channelORA_DISK_1: finished piece 1 at 23-MAY-12

piecehandle=/DBBak/bak_WWL_05_23_0anbmtkr_1_1 tag=TAG20120523T121210 comment=NONE

channelORA_DISK_1: backup set complete, elapsed time: 00:01:46

Finished backupat 23-MAY-12

Starting ControlFile and SPFILE Autobackup at 23-MAY-12

piecehandle=/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-00 comment=NONE

Finished ControlFile and SPFILE Autobackup at 23-MAY-12

RMAN>

1.2.2 备份USER表空间

RMAN> backuptablespace users;

Starting backupat 23-MAY-12

using channelORA_DISK_1

channelORA_DISK_1: starting full datafile backupset

channelORA_DISK_1: specifying datafile(s) in backupset

input datafilefno=00004 name=/DBData/WWL/users01.dbf

channelORA_DISK_1: starting piece 1 at 23-MAY-12

channelORA_DISK_1: finished piece 1 at 23-MAY-12

piecehandle=/DBBak/bak_WWL_05_23_0cnbn2a3_1_1 tag=TAG20120523T133147 comment=NONE

channelORA_DISK_1: backup set complete, elapsed time: 00:00:04

Finished backupat 23-MAY-12

Starting ControlFile and SPFILE Autobackup at 23-MAY-12

piece handle=/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-01comment=NONE

Finished ControlFile and SPFILE Autobackup at 23-MAY-12

RMAN>

1.2.3 备份数据文件

RMAN> backup datafile 1,2,3;

Starting backupat 23-MAY-12

using channelORA_DISK_1

channelORA_DISK_1: starting full datafile backupset

channelORA_DISK_1: specifying datafile(s) in backupset

input datafilefno=00001 name=/DBData/WWL/system01.dbf

input datafilefno=00003 name=/DBData/WWL/sysaux01.dbf

input datafile fno=00002name=/DBData/WWL/undotbs01.dbf

channelORA_DISK_1: starting piece 1 at 23-MAY-12

channelORA_DISK_1: finished piece 1 at 23-MAY-12

piecehandle=/DBBak/bak_WWL_05_23_0enbn2bk_1_1 tag=TAG20120523T133235 comment=NONE

channelORA_DISK_1: backup set complete, elapsed time: 00:01:48

Finished backupat 23-MAY-12

Starting ControlFile and SPFILE Autobackup at 23-MAY-12

piecehandle=/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-02 comment=NONE

Finished ControlFile and SPFILE Autobackup at 23-MAY-12

RMAN>

1.2.4 备份控制文件

RMAN> backup current controlfile;

Starting backupat 23-MAY-12

using channelORA_DISK_1

channelORA_DISK_1: starting full datafile backupset

channelORA_DISK_1: specifying datafile(s) in backupset

includingcurrent control file in backupset

channelORA_DISK_1: starting piece 1 at 23-MAY-12

channelORA_DISK_1: finished piece 1 at 23-MAY-12

piecehandle=/DBBak/bak_WWL_05_23_0gnbn2je_1_1 tag=TAG20120523T133645 comment=NONE

channelORA_DISK_1: backup set complete, elapsed time: 00:00:01

Finished backupat 23-MAY-12

Starting ControlFile and SPFILE Autobackup at 23-MAY-12

piecehandle=/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-03 comment=NONE

Finished ControlFile and SPFILE Autobackup at 23-MAY-12

RMAN>

1.2.5 备份spfile文件

RMAN> backup spfile;

Starting backupat 23-MAY-12

using channelORA_DISK_1

channelORA_DISK_1: starting full datafile backupset

channelORA_DISK_1: specifying datafile(s) in backupset

includingcurrent SPFILE in backupset

channelORA_DISK_1: starting piece 1 at 23-MAY-12

channelORA_DISK_1: finished piece 1 at 23-MAY-12

piecehandle=/DBBak/bak_WWL_05_23_0inbn2l2_1_1 tag=TAG20120523T133737 comment=NONE

channelORA_DISK_1: backup set complete, elapsed time: 00:00:02

Finished backupat 23-MAY-12

Starting ControlFile and SPFILE Autobackup at 23-MAY-12

piecehandle=/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-04 comment=NONE

Finished ControlFile and SPFILE Autobackup at 23-MAY-12

RMAN>

1.2.6 查看我们刚才备份的信息：

RMAN> list backup;

如下信息是之前做的备份：

using target database control file instead of recoverycatalog

List of Backup Sets

===================

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

2 Full 522.59M DISK 00:00:59 18-MAY-12

BP Key:2 Status: AVAILABLE Compressed: NO Tag: TAG20120518T185700

Piece Name:/DBBak/bak_WWL_05_18_04nbaffs_1_1

List of Datafilesin backup set 2

File LV Type CkpSCN Ckp Time Name

---- -- -------------- --------- ----

1 Full 618100 18-MAY-12 /DBData/WWL/system01.dbf

2 Full 618100 18-MAY-12 /DBData/WWL/undotbs01.dbf

3 Full 618100 18-MAY-12 /DBData/WWL/sysaux01.dbf

4 Full 618100 18-MAY-12 /DBData/WWL/users01.dbf

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

3 Full 6.80M DISK 00:00:02 18-MAY-12

BP Key:3 Status: AVAILABLE Compressed: NO Tag: TAG20120518T185806

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120518-01

Control FileIncluded: Ckp SCN: 618100 Ckp time:18-MAY-12

SPFILE Included:Modification time: 18-MAY-12

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

4 Full 523.54M DISK 00:01:09 21-MAY-12

BP Key:4 Status: AVAILABLE Compressed: NO Tag: TAG20120521T145403

Piece Name:/DBBak/bak_WWL_05_21_06nbhucb_1_1

List of Datafilesin backup set 4

File LV Type CkpSCN Ckp Time Name

---- -- -------------- --------- ----

1 Full 622304 21-MAY-12 /DBData/WWL/system01.dbf

2 Full 622304 21-MAY-12 /DBData/WWL/undotbs01.dbf

3 Full 622304 21-MAY-12 /DBData/WWL/sysaux01.dbf

4 Full 622304 21-MAY-12 /DBData/WWL/users01.dbf

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

5 Full 6.80M DISK 00:00:01 21-MAY-12

BP Key:5 Status: AVAILABLE Compressed: NO Tag: TAG20120521T145520

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120521-00

Control FileIncluded: Ckp SCN: 622304 Ckp time:21-MAY-12

SPFILE Included:Modification time: 21-MAY-12

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

6 Full 368.00K DISK 00:00:00 21-MAY-12

BP Key:6 Status: AVAILABLE Compressed: NO Tag: TAG20120521T151349

Piece Name:/DBBak/bak_WWL_05_21_08nbhvhe_1_1

List of Datafilesin backup set 6

File LV Type CkpSCN Ckp Time Name

---- -- -------------- --------- ----

4 Full 622968 21-MAY-12 /DBData/WWL/users01.dbf

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

7 Full 6.80M DISK 00:00:01 21-MAY-12

BP Key:7 Status: AVAILABLE Compressed: NO Tag: TAG20120521T151351

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120521-01

Control FileIncluded: Ckp SCN: 622968 Ckp time:21-MAY-12

SPFILE Included:Modification time: 21-MAY-12

今天的备份信息如下：

如下是全库备份信息：

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

8 Full 524.66M DISK 00:01:36 23-MAY-12

BP Key:8 Status: AVAILABLE Compressed: NO Tag: TAG20120523T121210

Piece Name:/DBBak/bak_WWL_05_23_0anbmtkr_1_1

List of Datafilesin backup set 8

File LV Type CkpSCN Ckp Time Name

---- -- -------------- --------- ----

1 Full 649219 23-MAY-12 /DBData/WWL/system01.dbf

2 Full 649219 23-MAY-12 /DBData/WWL/undotbs01.dbf

3 Full 649219 23-MAY-12 /DBData/WWL/sysaux01.dbf

4 Full 649219 23-MAY-12 /DBData/WWL/users01.dbf

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

9 Full 6.80M DISK 00:00:01 23-MAY-12

BP Key:9 Status: AVAILABLE Compressed: NO Tag: TAG20120523T121358

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-00

Control FileIncluded: Ckp SCN: 649233 Ckp time:23-MAY-12

SPFILE Included:Modification time: 23-MAY-12

如下是备份USER表空间信息：

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

10 Full 432.00K DISK 00:00:01 23-MAY-12

BP Key: 10 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133147

Piece Name:/DBBak/bak_WWL_05_23_0cnbn2a3_1_1

List of Datafilesin backup set 10

File LV Type CkpSCN Ckp Time Name

---- -- -------------- --------- ----

4 Full 651081 23-MAY-12 /DBData/WWL/users01.dbf

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

11 Full 6.80M DISK 00:00:03 23-MAY-12

BP Key:11 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133151

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-01

Control FileIncluded: Ckp SCN: 651086 Ckp time:23-MAY-12

SPFILE Included:Modification time: 23-MAY-12

如下是备份数据文件1，2，3的信息：

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

12 Full 524.61M DISK 00:01:42 23-MAY-12

BP Key:12 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133235

Piece Name:/DBBak/bak_WWL_05_23_0enbn2bk_1_1

List of Datafilesin backup set 12

File LV Type CkpSCN Ckp Time Name

---- -- -------------- --------- ----

1 Full 651104 23-MAY-12 /DBData/WWL/system01.dbf

2 Full 651104 23-MAY-12 /DBData/WWL/undotbs01.dbf

3 Full 651104 23-MAY-12 /DBData/WWL/sysaux01.dbf

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

13 Full 6.80M DISK 00:00:01 23-MAY-12

BP Key:13 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133424

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-02

Control FileIncluded: Ckp SCN: 651119 Ckp time:23-MAY-12

SPFILE Included:Modification time: 23-MAY-12

如下备份的是控制文件信息：

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

14 Full 6.77M DISK 00:00:01 23-MAY-12

BP Key:14 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133645

Piece Name:/DBBak/bak_WWL_05_23_0gnbn2je_1_1

Control FileIncluded: Ckp SCN: 651150 Ckp time:23-MAY-12

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

15 Full 6.80M DISK 00:00:01 23-MAY-12

BP Key:15 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133648

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-03

Control FileIncluded: Ckp SCN: 651154 Ckp time:23-MAY-12

SPFILE Included:Modification time: 23-MAY-12

如下是备份spfile文件的信息：

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

16 Full 80.00K DISK 00:00:01 23-MAY-12

BP Key:16 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133737

Piece Name:/DBBak/bak_WWL_05_23_0inbn2l2_1_1

SPFILE Included:Modification time: 23-MAY-12

BS Key Type LVSize Device Type Elapsed TimeCompletion Time

------- ---- -- ---------- ----------- ---------------------------

17 Full 6.80M DISK 00:00:02 23-MAY-12

BP Key:17 Status: AVAILABLE Compressed: NO Tag: TAG20120523T133740

Piece Name:/DBSoft/product/10.2.0/db_1/dbs/c-5520179-20120523-04

Control FileIncluded: Ckp SCN: 651175 Ckp time:23-MAY-12

SPFILE Included:Modification time: 23-MAY-12

RMAN>

恢复大综合：

介于Rman恢复的自动性，我们刚才对数据库的全库，单表空间，数据文件控制文件和参数文件都做了备份，这些备份的内容是数据库运行不可缺少的必要元素，通常情况下我们在生产库中只需要备份这些内容即可。有了这些备份，即使数据库的的任何信息丢失，我们都可以得以恢复使得数据库的正常运行，当然如果我们将archive log 也备份，当然就会更好了，一般情况下这个可以不用备份，备份archive log占用空间非常大。如果有海量的储存，当然备份也无妨咯。

Egg:

2.1 删除数据库的所有文件，仅保留redo日志和archivelog文件

删除控制文件：

[oracle@wwldb WWL]$ pwd

/DBData/oradata/WWL

[oracle@wwldb WWL]$ ls

control02.ctl control03.ctl

[oracle@wwldb WWL]$ rm -rf *.ctl

[oracle@wwldbWWL]$

[oracle@wwldb WWL]$ pwd

/DBSoft/oradata/WWL

[oracle@wwldb WWL]$ ls

control01.ctl

[oracle@wwldb WWL]$ rm -rf control01.ctl

[oracle@wwldbWWL]$

删除数据文件：

[oracle@wwldb WWL]$ ls

redo01.log redo02.log redo03.log sysaux01.dbf system01.dbf temp01.dbf undotbs01.dbf users01.dbf

[oracle@wwldb WWL]$ rm -rf *.dbf

[oracle@wwldb WWL]$ ls

redo01.log redo02.log redo03.log

[oracle@wwldbWWL]$

删除参数文件：

[oracle@wwldb dbs]$ cd $ORACLE_HOME/dbs

[oracle@wwldb dbs]$ rm -rf spfileWWL.ora

[oracle@wwldbdbs]$

执行大恢复

1、现在数据库是关闭状态

[oracle@wwldb dbs]$ ps -ef|grep ora

root 2910 2888 0 10:02 ? 00:00:15 hald-addon-storage: polling/dev/hdc

root 28954 3478 0 11:38 pts/1 00:00:00 su - oracle

oracle 28955 28954 0 11:38 pts/1 00:00:00 -bash

root 29361 3438 0 13:41 pts/2 00:00:00 su - oracle

oracle 29362 29361 0 13:41 pts/2 00:00:01 -bash

oracle 29988 29362 0 16:06 pts/2 00:00:00sqlplus as sysdba

oracle 30102 28955 0 17:03 pts/1 00:00:00 ps -ef

oracle 30103 28955 0 17:03 pts/1 00:00:00 grep ora

[oracle@wwldbdbs]$

2、要恢复首先要将数据库启动到mount状态才能恢复

[oracle@wwldb dbs]$ sqlplus / as sysdba

SQL*Plus:Release 10.2.0.1.0 - Production on Wed May 23 17:03:42 2012

Connected to anidle instance.

SQL> startup

ORA-01078:failure in processing system parameters

LRM-00109: couldnot open parameter file '/DBSoft/product/10.2.0/db_1/dbs/initWWL.ora'

SQL>

3、因为数据库没有参数文件，起不来，只能能启动到nomount状态

[oracle@wwldb dbs]$ rman target /

RecoveryManager: Release 10.2.0.1.0 - Production on Wed May 23 17:06:32 2012

connected totarget database (not started)

RMAN> startup force nomount;

startup failed:ORA-01078: failure in processing system parameters

LRM-00109: couldnot open parameter file '/DBSoft/product/10.2.0/db_1/dbs/initWWL.ora'

starting Oracleinstance without parameter file for retrival of spfile

Oracle instancestarted

Total System GlobalArea 159383552 bytes

Fixed Size 1218244 bytes

VariableSize 58722620 bytes

DatabaseBuffers 92274688 bytes

RedoBuffers 7168000 bytes

RMAN>

4、开始恢复参数文件，只有恢复了参数文件和控制文件数据库才能到mount状态来恢复数据文件：

RMAN> restorespfile from autobackup;

Starting restoreat 23-MAY-12

using targetdatabase control file instead of recovery catalog

allocatedchannel: ORA_DISK_1

channelORA_DISK_1: sid=36 devtype=DISK

RMAN-00571:===========================================================

RMAN-00569:=============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571:===========================================================

RMAN-03002:failure of restore command at 05/23/2012 17:08:42

RMAN-06495: mustexplicitly specify DBID with SET DBID command

RMAN>

注意：这里有问题了，spfile无法恢复，必须指定DBID。我记得在每次登录到rman的时候都会显示一个数据库的DBID，但是为什么这里要我们指定DBID呢？？？原因很简单，因为我们登录RMAN的时候，数据库已经宕机了，而且参数文件，控制文件，数据文件都没有了，它到哪里去找DBID；所以需要我们手动来指定，问题是现在既然登录的时候不显示，我们也不知道在哪里呀,如下:

[oracle@wwldb dbs]$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on WedMay 23 17:06:32 2012

connected to targetdatabase (not started)

没关系的因为我们的控制文件做了自动备份，在自动备份的控制文件里面已经存在了DBID，我们现在去找找吧，默认就备份在如下位置：

[oracle@wwldb dbs]$ pwd

/DBSoft/product/10.2.0/db_1/dbs

[oracle@wwldb dbs]$ ls

c-5520179-20120518-01 c-5520179-20120523-01 hc_WWL.dat lkWWL

其中5520179就是DBID了，我们只需要通过指定这个DBID，就可以将spfile恢复并将数据库启动到mount状态。

RMAN> set DBID=5520179

executingcommand: SET DBID

RMAN> restore spfile from autobackup;

Starting restoreat 23-MAY-12

using targetdatabase control file instead of recovery catalog

allocatedchannel: ORA_DISK_1

channelORA_DISK_1: sid=39 devtype=DISK

channelORA_DISK_1: looking for autobackup on day: 20120523

channelORA_DISK_1: autobackup found: c-5520179-20120523-04

channelORA_DISK_1: SPFILE restore from autobackup complete

Finished restoreat 23-MAY-12

RMAN>

5、恢复控制文件

RMAN> restore controlfile from autobackup;

Starting restoreat 23-MAY-12

using channelORA_DISK_1

channelORA_DISK_1: looking for autobackup on day: 20120523

channelORA_DISK_1: autobackup found: c-5520179-20120523-04

channelORA_DISK_1: control file restore from autobackup complete

outputfilename=/DBSoft/product/10.2.0/db_1/dbs/cntrlWWL.dbf

Finished restoreat 23-MAY-12

RMAN>

重启数据库到mount状态 ---很重要

SQL> startup mount;

ORACLE instancestarted.

Total SystemGlobal Area 285212672 bytes

Fixed Size 1218968 bytes

VariableSize 79693416 bytes

DatabaseBuffers 197132288 bytes

RedoBuffers 7168000 bytes

Databasemounted.

SQL> exit

Disconnectedfrom Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production

With thePartitioning, OLAP and Data Mining options

[oracle@wwldb dbs]$ rman target /

RecoveryManager: Release 10.2.0.1.0 - Production on Wed May 23 19:04:15 2012

connected totarget database: WWL (DBID=5520179, not open)

注意：详细参考如下：

http://blog.csdn.net/wuweilong/article/details/7596056

http://space.itpub.net/?uid-20674423-action-viewspace-itemid-730717

6、恢复数据库其它的数据文件：

RMAN> restore database;

Starting restoreat 23-MAY-12

using targetdatabase control file instead of recovery catalog

allocatedchannel: ORA_DISK_1

channelORA_DISK_1: sid=156 devtype=DISK

channelORA_DISK_1: starting datafile backupset restore

channelORA_DISK_1: specifying datafile(s) to restore from backup set

restoringdatafile 00004 to /DBData/WWL/users01.dbf

channelORA_DISK_1: reading from backup piece /DBBak/bak_WWL_05_23_0cnbn2a3_1_1

channelORA_DISK_1: restored backup piece 1

piece handle=/DBBak/bak_WWL_05_23_0cnbn2a3_1_1tag=TAG20120523T133147

channelORA_DISK_1: restore complete, elapsed time: 00:00:02

channelORA_DISK_1: starting datafile backupset restore

channelORA_DISK_1: specifying datafile(s) to restore from backup set

restoringdatafile 00001 to /DBData/WWL/system01.dbf

restoringdatafile 00002 to /DBData/WWL/undotbs01.dbf

restoringdatafile 00003 to /DBData/WWL/sysaux01.dbf

channelORA_DISK_1: reading from backup piece /DBBak/bak_WWL_05_23_0enbn2bk_1_1

channelORA_DISK_1: restored backup piece 1

piecehandle=/DBBak/bak_WWL_05_23_0enbn2bk_1_1 tag=TAG20120523T133235

channelORA_DISK_1: restore complete, elapsed time: 00:01:05

Finished restoreat 23-MAY-12

RMAN>

RMAN> recover database;

Starting recoverat 23-MAY-12

using channel ORA_DISK_1

starting mediarecovery

media recovery complete,elapsed time: 00:00:05

Finished recoverat 23-MAY-12

RMAN> alter database open; ---------我们看到数据库已经打开了处于open状态

database opened

SQL> select instance_name,status from v$instance;

INSTANCE_NAME STATUS

----------------------------

WWL OPEN

SQL>

注意：