oracle归档模式下的Rman备份集在异机恢复简介

环境:

OS:Red Hat Linux As 5

DB:10.2.0.4

有些时候因为测试环境需要,我们需要使用生产库的备份集在另外一台新的机器上做恢复(前提是新机器事先安装Oracle软件,版本跟原库一致),下面是恢复过程.

1.在原库上做全备(在原库上操作)

run{

allocate channel c1 device type disk;

allocate channel c2 device type disk;

backup format '/u02/rman_backup/full_backup/full_backup_%T_%s' database;

sql 'alter system archive log current';

backup format '/u02/rman_backup/full_backup/arc_backup_%T_%s' archivelog all;

release channel c1;

release channel c2;

}

2.查看原库的DBID(在原库上操作)

因为在做恢复的过程中需要设定DBID,这里需要找到原库的DBID

SQL> select dbid from v$database;

 DBID

----------

1820932955

-----以下的操作没有特殊说明,全部在目的库上操作-----

3.使用ftp将原库上的备份集拷贝到目的库的目录/u02/ftp/(具体操作省略)

4.在新机器上创建如下目录

mkdir /u02/mydb

mkdir -p /u02/mydb/oracl/{adump,bdump,cdump,dpdump,udump,pfile}

mkdir -p /u02/mydb/oradata/oracl

mkdir -p /u02/mydb/flash_recovery_area

5.创建密码文件

orapwd file=/u01/app/oracle/product/10.2.0/db_1/dbs/orapworacl.ora password=oracle

6.恢复参数文件

[oracle@hxlbak ~]$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Fri Jun 29 06:51:54 2012

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

connected to target database (not started)

RMAN>set dbid 1820932955 -- 这里的dbid需要跟原库保持一致

RMAN> startup nomount

本文URL地址：http://www.bianceng.cn/database/Oracle/201410/45468.htm

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

LRM-00109: could not open parameter file '/u01/app/oracle/product/10.2.0/db_1/dbs/initoracl.ora'

starting Oracle instance without parameter file for retrival of spfile

Oracle instance started

Total System Global Area     159383552 bytes

Fixed Size                     1218268 bytes

Variable Size                 54528292 bytes

Database Buffers             100663296 bytes

Redo Buffers                   2973696 bytes

RMAN> restore spfile to pfile '/u01/app/oracle/product/10.2.0/db_1/dbs/initoracl.ora' from '/u02/ftp/full_backup_20120628_37';

Starting restore at 29-JUN-12

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=36 devtype=DISK

channel ORA_DISK_1: autobackup found: /u02/ftp/full_backup_20120628_37

channel ORA_DISK_1: SPFILE restore from autobackup complete

Finished restore at 29-JUN-12

备份集full_backup_20120628_3里7包含了参数文件,我们在备份数据的时候会默认备份参数文件,可以在原库使用list backup查看,list backup输出部分内容如下:

BS Key  Type LV Size       Device Type Elapsed Time Completion Time

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

35      Full    80.00K     DISK        00:00:01     28-JUN-12

BP Key: 35   Status: AVAILABLE  Compressed: NO  Tag: TAG20120628T184555

Piece Name: /u02/rman_backup/full_backup/full_backup_20120628_37