通过使用resetlog恢复控制文件恢复数据库

来源：互联网发布：安装mysql步骤编辑：程序博客网时间：2024/04/30 14:58

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。

备份控制文件

backupdatafile 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.

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

[oracle@rhel510.2.0]$ rman target /

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

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。