根据RMAN的一个全备份进行异机恢复

根据rman的一个全备份进行异机恢复

一. Target 库准备工作：

备份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;

  }

 查看备份文件

 -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库准备工作：

1.创建口令文件

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

2.创建相关的目录

$ mkdir oradata

$ pwd

/u01/oradata

3.拷贝target库的pfile和备份的db到auxiliary库。

4、使用pfile将auxiliary库启动到nomount状态

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

5、恢复控制文件

$ export Oracle_SID=hy2

$ rman target /

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

6、将db启动到mount状态

RMAN> alter database mount;

7、restore db

7.1恢复目录不同的情况：

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恢复目录相同

RMAN>restore database;

8、recover db

RMAN> recover database;

$ export Oracle_SID=ora10g

9、用open resetlogs?打开数据库

SQL> alter database open resetlogs;

10、mount数据库 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;

验证：

SQL> select name,dbid from v$database;

NAME            DBID

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

HY2       2874673008

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