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使用dbms_backup_restore包恢復(fù)數(shù)據(jù)庫

Oracle提供了一個包:DBMS_BACKUP_RESTORE包是由dbmsbkrs.sql 和 prvtbkrs.plb 這兩個腳本創(chuàng)建的.catproc.sql 腳本運(yùn)行后會調(diào)用這兩個包.所以是每個數(shù)據(jù)庫都有的這個包是Oracle服務(wù)器和操作系統(tǒng)之間IO操作的接口.由恢復(fù)管理器直接調(diào)用。而且據(jù)說這兩個腳本的功能是內(nèi)建到Oracle的一些庫文件中的.

由此可見，我們可以在數(shù)據(jù)庫 nomount 情況下調(diào)用這些package ,來達(dá)到我們的恢復(fù)目的

1、啟動數(shù)據(jù)庫到nomount狀態(tài)

[oracle@node1 ora11g]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Mon Dec 19 13:34:22 2011

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup nomount

ORACLE instance started.

Total System Global Area 2137886720 bytes

Fixed Size 2230072 bytes

Variable Size 1493174472 bytes

Database Buffers 637534208 bytes

Redo Buffers 4947968 bytes

2、恢復(fù)controlfile

SQL> DECLARE

2 devtype varchar2(256);

3 done boolean;

4 BEGIN

5 devtype:=sys.dbms_backup_restore.deviceAllocate (type=>'',ident=>'t1');

6 sys.dbms_backup_restore.restoreSetDatafile;

7 sys.dbms_backup_restore.restoreControlfileTo(cfname=>'/opt/oracle/oracleplus/ora11g/control01.ctl');

8 sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/tmp/ora11g_02mu1avd_1_1.rman', params=>null);

9 sys.dbms_backup_restore.deviceDeallocate;

10 END;

11 /

PL/SQL procedure successfully completed.

3、恢復(fù)數(shù)據(jù)文件

SQL> DECLARE

2 devtype varchar2(256);

3 done boolean;

4 BEGIN

5 devtype:=sys.dbms_backup_restore.deviceAllocate (type=>'',ident=>'t1');

6 sys.dbms_backup_restore.restoreSetDatafile;

7 sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>1,toname=>'/opt/oracle/oracleplus/ora11g/system01.dbf');

sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>2,toname=>'/opt/oracle/oracleplus/ora11g/sysaux01.dbf');

sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>3,toname=>'/opt/oracle/oracleplus/ora11g/undotbs01.dbf');

8 9 10 sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>4,toname=>'/opt/oracle/oracleplus/ora11g/users01.dbf');

11 sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>5,toname=>'/opt/oracle/oracleplus/ora11g/example01.dbf');

12 sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/tmp/ora11g_01mu1aqq_1_1.rman', params=>null);

13 sys.dbms_backup_restore.deviceDeallocate;

14 END;

15 /

PL/SQL procedure successfully completed.

4、啟動數(shù)據(jù)庫

SQL> alter database mount;

SQL> alter database recover until cancel using backup controlfile;

SQL> alter database open resetlogs;

5、特別說明

在oracle 10g及其以后版本中，因?yàn)閞man中有catalog with start命令，可以實(shí)現(xiàn)rman備份的加載，所以不需要使用dbms_backup_restore包處理，在oracle 9i及其以前版本中，可能因?yàn)闆]有catalog庫，控制文件中又沒有了備份集信息，需要采用這種方法處理數(shù)據(jù)文件還原，然后根據(jù)實(shí)際情況，使用ALTER DATABASE REGISTER LOGFILE 添加日志，進(jìn)行恢復(fù)

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