根據RMAN的一個全備份進行異機恢複

根據rman的一個全備份進行異機恢複

一. Target 庫準備工作：

備份db

run {

 allocate channel ch1 device type disk maxpiecesize=10g;

 sql 'alter system archive log current';

 change archivelog all crosscheck;

 backup full database tag=ora10gdbfullbk

  format '/u01/backup/%d_db_%t_%s_%p'

  plus archivelog format '/u01/backup/%d_arch_%t_%s_%p' delete all input;

 backup current controlfile

  format '/u01/backup/%d_ctlfile_%t_%s_%p';

 release channel ch1;

  }

 查看備份檔案

 -bash-3.1$ ll /u01/backup

total 850468

-rw-r--r-- 1 root root      1277 Apr 20 21:53 initora10g.ora

-rw-r--r-- 1 root root   8484864 Apr 21 04:05 ORA10G_arch_749016313_41_1

-rw-r--r-- 1 root root    386560 Apr 21 04:11 ORA10G_arch_749016700_43_1

-rw-r--r-- 1 root root   7438336 Apr 21 04:11 ORA10G_ctlfile_749016703_44_1

-rw-r--r-- 1 root root 853688320 Apr 21 04:11 ORA10G_db_749016331_42_1

二. Auxiliary庫準備工作：

1.建立口令檔案

$ orapwd file=/u01/app/Oracle/product/10.2.0/db_1/dbs/orapwhy2 password=oracle

2.建立相關的目錄

$ mkdir oradata

$ pwd

/u01/oradata

3.拷貝target庫的pfile和備份的db到auxiliary庫。

4、使用pfile將auxiliary庫啟動到nomount狀態

SQL> startup nomount pfile=/u01/app/oracle/product/10.2.0/db_1/dbs/orapwhy2;

5、恢複控制檔案

$ export ORACLE_SID=hy2

$ rman target /

RMAN>restore controlfile from '/u01/backup/ORA10G_ctlfile_749016703_44_1';

6、將db啟動到mount狀態

RMAN> alter database mount;

7、restore db

7.1恢複目錄不同的情況：

RMAN>

run

 {

set newname for datafile 1 to "/u01/oradata/system01.dbf";

set newname for datafile 2 to "/u01/oradata/sysaux01.dbf";

set newname for datafile 3 to "/u01/oradata/undotbs01.dbf";

set newname for datafile 4 to "/u01/oradata/users01.dbf";

restore database;

switch datafile all;

}

7.2恢複目錄相同

RMAN>restore database;

8、recover db

RMAN> recover database;

$ export ORACLE_SID=ora10g

9、用open resetlogs?開啟資料庫

SQL> alter database open resetlogs;

10、mount資料庫 用NID命令修改DBID和DBNAME

SQL> shutdown immediate

SQL> startup mount;

$nid target=sys/password dbname=hy2

SQL> alter system set db_name=hy2 scope=spfile;

SQL> shutdown immediate

SQL> startup

SQL> alter database open resetlogs;

驗證：

SQL> select name,dbid from v$database;

NAME            DBID

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

HY2       2874673008