分类目录归档：Oracle备份恢复

startup nomount;
create pfile=’/tmp/pfile’ from spfile;

修改pfile
*._allow_resetlogs_corruption=true
*._corrupted_rollback_segments=(_SYSSMU1$,_SYSSMU2$,_SYSSMU3$,_SYSSMU4$,
_SYSSMU5$,_SYSSMU6$,_SYSSMU7$,_SYSSMU8$,_SYSSMU9$,_SYSSMU10$)

startup pfile=’/tmp/pfile’ mount;
–undo数据文件不用离线也可以打开的时候（2），不行采用下面的方法
alter database datafile 2 offline drop;
alter database open;

CREATE UNDO TABLESPACE UNDOTBS01
DATAFILE ‘/opt/oracle/oradata/xifenfei/UNDOTBS01.dbf’ SIZE 50M;
select segment_name,status from dba_rollback_segs;–查看是否有回滚段被创建，处于offline状态
shutdown immediate;

修改pfile：
*.undo_tablespace=’UNDOTBS01′

startup pfile=’/tmp/pfile’
–alter tablespace undotbs1 offline normal;（2）–使数据文件先离线，如果开始已经离线，这里不需要处理
select segment_name,status from dba_rollback_segs;
drop rollback segment “_SYSSMUx$”;
drop tablespace UNDOTBS02 including contents and datafiles;
select * from v$recover_file;–验证是否还有文件需要恢复
shutdown immediate

修改参数文件
#*._allow_resetlogs_corruption=true
#*._corrupted_rollback_segments=(_SYSSMU1$,_SYSSMU2$,_SYSSMU3$,_SYSSMU4$,_SYSSMU5$,
_SYSSMU6$,_SYSSMU7$,_SYSSMU8$,_SYSSMU9$,_SYSSMU10$)

startup pfile=’/tmp/pfile’;
create spfile from pfile=’/tmp/pfile’;

startup nomount;
create pfile=’/tmp/pfile’ from spfile;

修改pfile
*.undo_management=’MANUAL’
*.undo_tablespace=’SYSTEM’
#*.undo_tablespace=’UNDOTBS02′
#*.undo_management=’AUTO’

startup pfile=’/tmp/pfile’ mount;
alter database datafile 2 offline drop;
alter database open;
drop tablespace undotbs1 including contents;
select segment_name,status from dba_rollback_segs;
drop rollback segment “_SYSSMUx”$;
drop tablespace undotbs1 including contents;

CREATE UNDO TABLESPACE UNDOTBS02
DATAFILE ‘/opt/oracle/oradata/xifenfei/UNDOTBS02.dbf’ SIZE 50M
shutdown immediate;

修改pfile
#*.undo_management=’MANUAL’
#*.undo_tablespace=’SYSTEM’
*.undo_tablespace=’UNDOTBS02′
*.undo_management=’AUTO’

startup pfile=’/tmp/pfile’;
create spfile from pfile=’/tmp/pfile’;

一、查看数据库的dbid
select dbid from v$database;

二、修改参数文件
create pfile=’/tmp/pfile’ from spfile;
直接恢复spfile

三、rman操作
1.rman target /
2.startup nomount pfile=’xxxxxx’
3.set DBID=XXXXXXX

4.恢复控制文件

run{
allocate channel c1 type disk;
restore controlfile from '控制文件rman备份路径';
release channel c1;
}

5.加载控制文件
alter database mount;

6.恢复

run{
allocate channel c1 type disk;
[Set newname for datafile 1 to '新数据文件路径';]
restore database;
[switch datafile all;]
--rman中修改控制文件中datafile path
--sql "alter database rename file ''/opt/oracle/oradata/test/xff_02.dbf'' to ''/opt/oracle/oradata/test/xifenfei02.dbf''"
recover database;
release channel c1;
}