Oracle 异机恢复

╰+攻爆jí腚メ 2022-07-12 02:09 328阅读 0赞

注意事项：  
1 此处实验环境为同平台，同字节序，同版本，源机器和目标机器相同的目录结构。  
2 目标机器只需要安装oracle数据库软件即可。  
3 第一次利用备份恢复测试环境，之后从源机器拷贝备份到目标机器并在控制文件中注册，再见行恢复测试。  
   
一 拷贝参数文件备份、控制文件备份、数据文件备份、以及归档备份到新主机上  
   
1 rman 连接到源数据库  
   
\[oracle@oracle dbs\]$ rman target /  
Recovery Manager: Release 10.2.0.1.0 - Production on Tue Dec 11 19:02:05 2012  
Copyright (c) 1982, 2005, Oracle.  All rights reserved.  
connected to target database: CRM (DBID=3601019238)  
RMAN>  
2  分别列出参数文件备份，控制文件备份，数据文件备份，以及归档备份的名字  
   
参数文件备份如下：  
RMAN> list backup of spfile;  
BS Key  Type LV Size       Device Type Elapsed Time Completion Time  
\------- ---- -- ---------- ----------- ------------ ---------------  
13      Full    7.11M      DISK        00:00:04     09-DEC-12       
        BP Key: 13   Status: AVAILABLE  Compressed: NO  Tag: TAG20121209T040058  
        Piece Name: /oracle/app/db1/dbs/0dnsd96i\_1\_1  
  SPFILE Included: Modification time: 09-DEC-12  
控制文件备份如下：  
RMAN> list backup of controlfile;  
BS Key  Type LV Size       Device Type Elapsed Time Completion Time  
\------- ---- -- ---------- ----------- ------------ ---------------  
13      Full    7.11M      DISK        00:00:04     09-DEC-12       
        BP Key: 13   Status: AVAILABLE  Compressed: NO  Tag: TAG20121209T040058  
        Piece Name: /oracle/app/db1/dbs/0dnsd96i\_1\_1  
  Control File Included: Ckp SCN: 2779528241   Ckp time: 09-DEC-12  
数据文件备份如下：  
RMAN> list backup of database;  
BS Key  Type LV Size       Device Type Elapsed Time Completion Time  
\------- ---- -- ---------- ----------- ------------ ---------------  
12      Full    599.38M    DISK        00:03:33     09-DEC-12       
        BP Key: 12   Status: AVAILABLE  Compressed: NO  Tag: TAG20121209T040058  
        Piece Name: /oracle/app/db1/dbs/0cnsd8vq\_1\_1  
  List of Datafiles in backup set 12  
  File LV Type Ckp SCN    Ckp Time  Name  
  ---- -- ---- ---------- --------- ----  
  1       Full 2779528081 09-DEC-12 /oracle/test/system1.dbf  
  2       Full 2779528081 09-DEC-12 /oracle/test/zxb.dbf  
  3       Full 2779528081 09-DEC-12 /oracle/test/sysaux01.dbf  
  4       Full 2779528081 09-DEC-12 /oracle/test/users01.dbf  
  5       Full 2779528081 09-DEC-12 /oracle/test/zxa.dbf  
  6       Full 2779528081 09-DEC-12 /oracle/test/test1.dbf  
  7       Full 2779528081 09-DEC-12 /oracle/test/zxc.dbf  
  8       Full 2779528081 09-DEC-12 /oracle/test/undotbs1.dbf  
  9       Full 2779528081 09-DEC-12 /oracle/test/zxbig.dbf  
   
列出归档备份如下：  
RMAN> list backup of archivelog all;  
注意：归档的备份应该包括当前联机日志文件。  
3 copy 这些备份到新的主机  
   
二 恢复参数文件及控制文件  
   
 1 配置新主机上的ORACLE\_SID  
  export   ORACLE\_SID=CRM  
   
 2 在新主机上发起rman连接  
   
\[oracle@oracle dbs\]$ rman target /  
   
Recovery Manager: Release 10.2.0.1.0 - Production on Mon Dec 10 05:49:11 2012  
   
Copyright (c) 1982, 2005, Oracle. All rights reserved.  
   
connected to target database (not started)  
   
3  设置dbid 并启动实例到nomount状态  
     
RMAN> set dbid 3601019238  
   
executing command: SET DBID  
   
RMAN> startup nomount  
   
startup failed: ORA-01078: failure in processing system parameters  
LRM-00109: could not open parameter file '/oracle/app/db1/dbs/initCRM.ora'  
   
starting Oracle instance without parameter file for retrival of spfile  
Oracle instance started  
   
Total System Global Area     159383552 bytes  
   
Fixed Size                     2019224 bytes  
Variable Size                 67108968 bytes  
Database Buffers              83886080 bytes  
Redo Buffers                   6369280 bytes  
注意：在rman下即使没有参数文件，默认也会启动一个DUMMY实例，以便能够恢复参数文件。  
4  恢复spfile文件  
   
RMAN> restore spfile to '/oracle/app/db1/dbs/spfileCRM.ora' from '/oracle/app/db1/dbs/0dnsd96i\_1\_1';  
   
Starting restore at 10-DEC-12  
using target database control file instead of recovery catalog  
allocated channel: ORA\_DISK\_1  
channel ORA\_DISK\_1: sid=34 devtype=DISK  
   
channel ORA\_DISK\_1: autobackup found: /oracle/app/db1/dbs/0dnsd96i\_1\_1  
channel ORA\_DISK\_1: SPFILE restore from autobackup complete  
Finished restore at 10-DEC-12  
   
5 startup force nomount  
   
RMAN> startup force nomount;  
   
Oracle instance started  
   
Total System Global Area     322961408 bytes  
   
Fixed Size                     2020480 bytes  
Variable Size                 96471936 bytes  
Database Buffers             218103808 bytes  
Redo Buffers                   6365184 bytes  
   
6 恢复控制文件  
   
RMAN> restore controlfile to '/oracle/CRM2/CRM/control01.ctl' from '/oracle/app/db1/dbs/0dnsd96i\_1\_1';  
   
Starting restore at 10-DEC-12  
allocated channel: ORA\_DISK\_1  
channel ORA\_DISK\_1: sid=210 devtype=DISK  
   
channel ORA\_DISK\_1: restoring control file  
channel ORA\_DISK\_1: restore complete, elapsed time: 00:00:04  
Finished restore at 10-DEC-12  
   
   
cp /oracle/CRM2/CRM/control01.ctl /oracle/CRM2/CRM/control02.ctl  
   
7 启动数据库到加载状态  
RMAN> alter database mount;  
   
database mounted  
released channel: ORA\_DISK\_1  
   
三  在新控制文件中注册数据文件备份和归档备份  
   
RMAN> catalog start with '/backup/';    \#取消是drop catalog  
   
searching for all files that match the pattern /backup/  
   
List of Files Unknown to the Database  
=====================================  
File Name: /backup/0ensd96n\_1\_1  
File Name: /backup/0bnsd8vn\_1\_1  
File Name: /backup/0cnsd8vq\_1\_1  
   
Do you really want to catalog the above files (enter YES or NO)? yes  
cataloging files...  
cataloging done  
   
List of Cataloged Files  
=======================  
File Name: /backup/0ensd96n\_1\_1  
File Name: /backup/0bnsd8vn\_1\_1  
File Name: /backup/0cnsd8vq\_1\_1  
   
四  恢复整个库  
   
1 RMAN> restore database;  
   
Starting restore at 10-DEC-12  
allocated channel: ORA\_DISK\_1  
channel ORA\_DISK\_1: sid=209 devtype=DISK  
   
channel ORA\_DISK\_1: starting datafile backupset restore  
channel ORA\_DISK\_1: specifying datafile(s) to restore from backup set  
restoring datafile 00001 to /oracle/test/system1.dbf  
restoring datafile 00002 to /oracle/test/zxb.dbf  
restoring datafile 00003 to /oracle/test/sysaux01.dbf  
restoring datafile 00004 to /oracle/test/users01.dbf  
restoring datafile 00005 to /oracle/test/zxa.dbf  
restoring datafile 00006 to /oracle/test/test1.dbf  
restoring datafile 00007 to /oracle/test/zxc.dbf  
restoring datafile 00008 to /oracle/test/undotbs1.dbf  
restoring datafile 00009 to /oracle/test/zxbig.dbf  
channel ORA\_DISK\_1: reading from backup piece /oracle/app/db1/dbs/0cnsd8vq\_1\_1  
channel ORA\_DISK\_1: restored backup piece 1  
piece handle=/oracle/app/db1/dbs/0cnsd8vq\_1\_1 tag=TAG20121209T040058  
channel ORA\_DISK\_1: restore complete, elapsed time: 00:02:56  
Finished restore at 10-DEC-12  
   
  
\#restore archivelog all;  
2 RMAN> recover database;  
   
Starting recover at 10-DEC-12  
using channel ORA\_DISK\_1  
   
starting media recovery  
   
archive log thread 1 sequence 16 is already on disk as file /oracle/CRM2/CRM/redo04b.log  
archive log thread 1 sequence 17 is already on disk as file /oracle/CRM2/CRM/redo05.log  
archive log filename=/oracle/CRM2/CRM/redo04b.log thread=1 sequence=16  
archive log filename=/oracle/CRM2/CRM/redo05.log thread=1 sequence=17  
media recovery complete, elapsed time: 00:00:05  
Finished recover at 10-DEC-12  
   
3 alter database open resetlogs 打开数据库  
SQL> alter database open resetlogs；  
   
Database altered.

总结：到此，库已经恢复完成，以后只需要把源机器数据备份、归档备份，或者归档文件，拷贝到目标机器上，并在控制文件中注册该备份(catalog start with ‘/backup/’)然后执行恢复即可。

如果异机异位置恢复的话，可以使用一下方式进行恢复；

run \{  
set newname for datafile 1 to '/data/orcl/datafile/system01.dbf';  
set newname for datafile 2 to '/data/orcl/datafile/sysaux01.dbf';  
set newname for datafile 3 to '/data/orcl/datafile/undotbs01.dbf';  
set newname for datafile 4 to '/data/orcl/datafile/users01.dbf';  
set newname for datafile 5 to '/data/orcl/datafile/bsskzy01.dbf';  
set newname for datafile 6 to '/data/orcl/datafile/zyscm01.dbf';  
set newname for datafile 7 to '/data/orcl/datafile/zyscm\_index01.dbf';  
set newname for datafile 8 to '/data/orcl/datafile//retbillmt01.dbf';  
set newname for datafile 9 to '/data/orcl/datafile/retbillmt\_index01.dbf';  
set newname for datafile 10 to '/data/orcl/datafile/retgoodsdt01.dbf';  
set newname for datafile 11 to '/data/orcl/datafile/retgoodsdt\_index01.dbf';  
set newname for datafile 12 to  '/data/orcl/datafile/rettypedt01.dbf';  
set newname for datafile 13 to  '/data/orcl/datafile/retgoodsdt\_index01.dbf';  
restore database;  
switch datafile all;  
\}