练习trace文本重建控制文件
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这个小练习是针对控制文件全部丢失后怎么能快速的重建一个控制文件,快速的起库
1.备份控制文件到trace下
SQL> alter database backup controlfile to trace;
Database altered.
2.trace文本放在user_dump_dest的路径下
SQL> show parameter dump;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
background_core_dump string partial
background_dump_dest string /u01/app/oracle/diag/rdbms/ora
11gr2/ORA11GR2/trace
core_dump_dest string /u01/app/oracle/diag/rdbms/ora
11gr2/ORA11GR2/cdump
max_dump_file_size string unlimited
shadow_core_dump string partial
user_dump_dest string /u01/app/oracle/diag/rdbms/ora
11gr2/ORA11GR2/trace
3.打开alert查看生成的trace
[[email protected]]$cd /u01/app/oracle/diag/rdbms/ora11gr2/ORA11GR2/trace
[[email protected] trace]$ cat alert_ORA11GR2.log
Backup controlfile written to trace file /u01/app/oracle/diag/rdbms/ora11gr2/ORA11GR2/trace/ORA11GR2_ora_3790.trc
Completed: alter database backup controlfile to trace
Fri Dec 02 10:19:33 2016
Starting background process SMCO
Fri Dec 02 10:19:33 2016
SMCO started with pid=21, OS id=3907
④按时间排序,最新生成文件排在最前
[[email protected] trace]$ ls -lt
total 500
-rw-r----- 1 oracle oinstall 50839 Dec 2 10:19 alert_ORA11GR2.log
-rw-r----- 1 oracle oinstall 1068 Dec 2 10:19 ORA11GR2_mmon_3778.trc
-rw-r----- 1 oracle oinstall 76 Dec 2 10:19 ORA11GR2_mmon_3778.trm
-rw-r----- 1 oracle oinstall 18936 Dec 2 10:16 ORA11GR2_ora_3790.trc
-rw-r----- 1 oracle oinstall 227 Dec 2 10:16 ORA11GR2_ora_3790.trm
4.复制create controlfile
[[email protected] trace]$ cat ORA11GR2_ora_3790.trc
CREATE CONTROLFILE REUSE DATABASE "ORA11GR2" RESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 ‘/u01/app/oracle/oradata/ORA11GR2/redo01.log‘ SIZE 50M BLOCKSIZE 512,
GROUP 2 ‘/u01/app/oracle/oradata/ORA11GR2/redo02.log‘ SIZE 50M BLOCKSIZE 512,
GROUP 3 ‘/u01/app/oracle/oradata/ORA11GR2/redo03.log‘ SIZE 50M BLOCKSIZE 512
-- STANDBY LOGFILE
DATAFILE
‘/u01/app/oracle/oradata/ORA11GR2/system01.dbf‘,
‘/u01/app/oracle/oradata/ORA11GR2/sysaux01.dbf‘,
‘/u01/app/oracle/oradata/ORA11GR2/undotbs01.dbf‘,
‘/u01/app/oracle/oradata/ORA11GR2/users01.dbf‘,
‘/u01/app/oracle/oradata/ORA11GR2/example01.dbf‘
CHARACTER SET AL32UTF8
;
5.数据库启动到nomount状态
SQL> startup nomount
ORACLE instance started.
Total System Global Area 830930944 bytes
Fixed Size 2257800 bytes
Variable Size 536874104 bytes
Database Buffers 289406976 bytes
Redo Buffers 2392064 bytes
6.根据trace文本重建控制文件
SQL> CREATE CONTROLFILE REUSE DATABASE "ORA11GR2" RESETLOGS NOARCHIVELOG
2 MAXLOGFILES 16
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 100
5 MAXINSTANCES 8
6 MAXLOGHISTORY 292
7 LOGFILE
8 GROUP 1 ‘/u01/app/oracle/oradata/ORA11GR2/redo01.log‘ SIZE 50M BLOCKSIZE 512,
9 GROUP 2 ‘/u01/app/oracle/oradata/ORA11GR2/redo02.log‘ SIZE 50M BLOCKSIZE 512,
10 GROUP 3 ‘/u01/app/oracle/oradata/ORA11GR2/redo03.log‘ SIZE 50M BLOCKSIZE 512
11 -- STANDBY LOGFILE
12 DATAFILE
13 ‘/u01/app/oracle/oradata/ORA11GR2/system01.dbf‘,
14 ‘/u01/app/oracle/oradata/ORA11GR2/sysaux01.dbf‘,
15 ‘/u01/app/oracle/oradata/ORA11GR2/undotbs01.dbf‘,
16 ‘/u01/app/oracle/oradata/ORA11GR2/users01.dbf‘,
17 ‘/u01/app/oracle/oradata/ORA11GR2/example01.dbf‘
18 CHARACTER SET AL32UTF8
19 ;
Control file created.
7.起到open:报错,需要RESETLOGS
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> alter database open resetlogs;
Database altered.
SQL> select status from v$instance;
STATUS
------------
OPEN
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