通过使用resetlog恢复控制文件恢复数据库

环境：
rhel 5.5,Oracle10.2.0.1
xmanager4.0

通过备份控制文件后，对数据库进行一系列的操作，关闭数据库；恢复控制文件，启动到mount阶段在使用resetlogs重新创建控制文件，找回我们的数据。
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备份控制文件

backupdatafile 1;

RMAN>backup datafile 1;

RMAN>backup datafile 1;

Startingbackup at 26-JUN-12

usingchannel ORA_DISK_1

channelORA_DISK_1: starting compressed full datafile backupset

channelORA_DISK_1: specifying datafile(s) in backupset

inputdatafile fno=00001 name=/opt/oracle/product/10.2.0/oradata/cuug/system01.dbf

channelORA_DISK_1: starting piece 1 at 26-JUN-12

channelORA_DISK_1: finished piece 1 at 26-JUN-12

piecehandle=/opt/oracle/product/10.2.0/flash_recovery_area/CUUG/backupset/2012_06_26/o1_mf_nnndf_TAG20120626T114501_7yld1y1q_.bkptag=TAG20120626T114501 comment=NONE

channelORA_DISK_1: backup set complete, elapsed time: 00:08:06

channelORA_DISK_1: throttle time: 0:06:39

Finishedbackup at 26-JUN-12



StartingControl File Autobackup at 26-JUN-12

piecehandle=/opt/oracle/product/10.2.0/flash_recovery_area/CUUG/autobackup/2012_06_26/o1_mf_n_786973989_7yldk6mm_.bkpcomment=NONE

FinishedControl File Autobackup at 26-JUN-12

做一些操作和日志切换

SQL>select group#,sequence#,status from v$log;



GROUP#  SEQUENCE# STATUS

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

1            9 INACTIVE

2           10 CURRENT

3            7 INACTIVE

4            8 INACTIVE

[oracle@rhel5cuug]$ cp cuug01.dbf  cuug01.dbf_bak

SQL>select username,default_tablespace from dba_users where username='SCOTT';



USERNAME                       DEFAULT_TABLESPACE

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

SCOTT                               CUUG

SQL>create table scott.a as select * from tab;



Tablecreated.



SQL>create table scott.aa as select * fromtab;      



SQL>select count(*) from scott.a;



  COUNT(*)

----------

  3642

SQL>create tablespace test  datafile'/opt/oracle/product/10.2.0/oradata/cuug/test01.dbf' size 100m;



Tablespacecreated.



Tablespacecreated.

SQL>alter system switch logfile;



Systemaltered.

SQL>select file_name from dba_data_files;



FILE_NAME

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

/opt/oracle/product/10.2.0/oradata/cuug/cuug01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/rmans01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/users01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/sysaux01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/undotbs01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/system01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/test01.dbf



SQL>select group#,status,sequence# from v$log;



GROUP#STATUS             SEQUENCE#

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

1INACTIVE                     9

2CURRENT                    10

3INACTIVE                     7

4INACTIVE                     8



SQL>shutdown abort

ORACLEinstance shut down.





删除控制文件，修改cuug的数据文件

[oracle@rhel5cuug]$ mkdir bak

[oracle@rhel5cuug]$ mv *.ctl bak/

[oracle@rhel5cuug]$ mv cuug01.dbf cuug01.bak

SQL>startup

ORACLEinstance started.



TotalSystem Global Area  218103808 bytes

FixedSize                    1218604 bytes

VariableSize                   62916564 bytes

DatabaseBuffers          150994944 bytes

RedoBuffers                    2973696 bytes

ORA-00205:error in identifying control file, check alert log for more info



恢复控制文件

[[email protected]]$ rman target /



RecoveryManager: Release 10.2.0.1.0 - Production on Mon Jun 25 10:26:22 2012



Copyright(c) 1982, 2005, Oracle.  All rightsreserved.



connectedto target database: orcl (not mounted)



RMAN>restore controlfile from'/opt/oracle/product/10.2.0/flash_recovery_area/CUUG/autobackup/2012_06_26/o1_mf_n_786973989_7yldk6mm_.bkp';



Startingrestore at 26-JUN-12

usingchannel ORA_DISK_1



channelORA_DISK_1: restoring control file

channelORA_DISK_1: restore complete, elapsed time: 00:00:03

outputfilename=/opt/oracle/product/10.2.0/oradata/cuug/control01.ctl

outputfilename=/opt/oracle/product/10.2.0/oradata/cuug/control02.ctl

outputfilename=/opt/oracle/product/10.2.0/oradata/cuug/control03.ctl

Finishedrestore at 26-JUN-12



把控制文件

标记trace文件

SQL>alter session set tracefile_identifier='cuug';



Sessionaltered.



SQL>alter database mount;



Databasealtered.



SQL>alter database backup controlfile to trace;



Databasealtered.

重建控制文件，先关闭数据库，删除之前从备份中恢复出来的控制文件，启动到nomount阶段

SQL>shutdown immediate

ORA-01109:database not open





Databasedismounted.

ORACLEinstance shut down.



SQL>startup nomount;

ORACLEinstance started.



TotalSystem Global Area  218103808 bytes

FixedSize                    1218604 bytes

VariableSize                   79693780 bytes

DatabaseBuffers          134217728 bytes

RedoBuffers                    2973696 bytes



使用noresetlogs创建，因为联机日志还在，所以可以使用noresetlogs的方法创建

[oracle@rhel5orcl]$ ls *.ctl

control01.ctl  control02.ctl control03.ctl

[oracle@rhel5orcl]$ rm *.ctl



[oracle@rhel5udump]$ vi cuug_ora_4744_cuug.trc

CREATECONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS  ARCHIVELOG

MAXLOGFILES16

MAXLOGMEMBERS3

MAXDATAFILES100

MAXINSTANCES8

MAXLOGHISTORY292

LOGFILE

  GROUP 1'/opt/oracle/product/10.2.0/oradata/orcl/redo01.log'  SIZE 50M,

  GROUP 2'/opt/oracle/product/10.2.0/oradata/orcl/redo02.log'  SIZE 50M,

  GROUP 3'/opt/oracle/product/10.2.0/oradata/orcl/redo03.log'  SIZE 50M,

  GROUP 4'/opt/oracle/product/10.2.0/oradata/orcl/redo04.log'  SIZE 50M

--STANDBY LOGFILE

DATAFILE

'/opt/oracle/product/10.2.0/oradata/orcl/system01.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/undotbs01.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/sysaux01.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/users01.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/rmans01.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/cuug01.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/ORCL/datafile/o1_mf_zxm_7ycm0twl_.dbf',

'/opt/oracle/product/10.2.0/oradata/orcl/ORCL/datafile/o1_mf_cuug_7ycm20jq_.dbf'

CHARACTERSET UTF8

;

此时打开数据库会提示错误

首先要恢复数据文件

查询数据文件

SQL>select name from v$datafile;



NAME

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

/opt/oracle/product/10.2.0/oradata/cuug/system01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/undotbs01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/sysaux01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/users01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/rmans01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/cuug01.dbf

/opt/oracle/product/10.2.0/db_1/dbs/UNNAMED00007

SQL>alter database rename file '/opt/oracle/product/10.2.0/db_1/dbs/UNNAMED00007'to '/opt/oracle/product/10.2.0/oradata/cuug/test01.dbf';

SQL>select name from v$datafile;



NAME

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

/opt/oracle/product/10.2.0/oradata/cuug/system01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/undotbs01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/sysaux01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/users01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/rmans01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/cuug01.dbf

/opt/oracle/product/10.2.0/oradata/cuug/test01.dbf

目前数据文件还不一致，需要进行介质恢复，但是不用using子句

SQL>recover database using backup controlfile;

ORA-00279:change 708399 generated at 06/26/2012 12:11:13 needed for thread 1

ORA-00289:suggestion :

/opt/oracle/product/10.2.0/flash_recovery_area/CUUG/archivelog/2012_06_26/o1_mf_

1_10_%u_.arc

ORA-00280:change 708399 for thread 1 is in sequence #10





Specifylog: {<RET>=suggested | filename | AUTO | CANCEL}

/opt/oracle/product/10.2.0/oradata/cuug/redo02.log

Logapplied.

Mediarecovery complete

SQL>alter database open resetlogs;



Databasealtered.

查询恢复状态





selectfile_name,tablespace_name,bytes/1024/1024 MB fromdba_data_files       



FILE_NAME                                                    TABLESPACE_NAME                            MB

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

/opt/oracle/product/10.2.0/oradata/cuug/cuug01.dbf            CUUG                                   200

/opt/oracle/product/10.2.0/oradata/cuug/rmans01.dbf            RMANS                                   500

/opt/oracle/product/10.2.0/oradata/cuug/users01.dbf            USERS                                     5

/opt/oracle/product/10.2.0/oradata/cuug/sysaux01.dbf            SYSAUX                                   250

/opt/oracle/product/10.2.0/oradata/cuug/undotbs01.dbf            UNDOTBS1                                    25

/opt/oracle/product/10.2.0/oradata/cuug/system01.dbf            SYSTEM                                   480

/opt/oracle/product/10.2.0/oradata/cuug/test01.dbf            TEST                                  100       

SQL>select count(*) from scott.a

  2  ;



  COUNT(*)

----------

      3642



SQL>select count(*) from scott.aa;



  COUNT(*)

----------

      3642

恢复完成。