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1 重建控制文件
SYS@hyyk
alter database backup controlfile to /home/oracle/controlfile01.ctl
2. 删除当前使用的控制文件
SYS@hyyk
ho rm -rf /u01/app/oracle/oradata/hyyk/control01.ctl
3. 从启数据库
SYS@hyyk
startup force
ORACLE instance started.
Total System Global Area 776646656 bytes
Fixed Size 2217384 bytes
Variable Size 578816600 bytes
Database Buffers 188743680 bytes
Redo Buffers 6868992 bytes
ORA-00205: error in identifying control file,
check alert log for more info
4. 拷贝备份的控住文件
SYS@hyyk ho
cp /home/oracle/controlfile01.ctl /u01/app/oracle/oradata/hyyk/control01.ctl
SYS@hyyk
alter database mount;
Database altered.
SYS@hyyk
alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or
NORESETLOGS option for database open
SYS@hyyk
alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be
consistent
ORA-01110: data file 1: /u01/app/oracle/oradata/hyyk/system01.dbf
SYS@hyyk
recover database using backup controlfile;
ORA-00279: change 1324612 generated at
11/03/2017 11:03:43 needed for thread 1
ORA-00289: suggestion : /u01/app/oracle/archive/arch_1_943793507_23.log
ORA-00280: change 1324612 for thread 1 is
in sequence #23
这里查看 /u01/app/oracle/archive/arch_1_943793507_23.log 是否存在
如果不存在说明没有归档，
Specify log: {RET =suggested |
filename | AUTO | CANCEL}
/u01/app/oracle/oradata/hyyk/redo02.log
Log applied.
Media recovery complete.
// 以 RESETLOGS 的方式启动数据库
SYS@hyyk
alter database open resetlogs;
Database altered.
// 及时进行全库备份
实验 2 修改数据库结构后丢所有的控制文件
实验思路：1. 备份当前的控制文件
2. 建立一个表空间和表
3. 删除当前的控制文件
4. 从启数据库
5. 发现控制文件和数据文件不一致
备份控制文件
SYS@hyyk
alter database backup controlfile to /home/oracle/control01.ctl
创建表空间和表
SYS@hyyk
create tablespace t2 datafile /u01/app/oracle/oradata/hyyk/t2.dbf size 10m;
SYS@hyyk
create table b(id number) tablespace t2;
SYS@hyyk
insert into b values(2);
SYS@hyyk
commit;
删除当前的控制文件
SYS@hyyk
ho cp /home/oracle/control01.ctl /u01/app/oracle/oradata/hyyk/control01.ctl
SYS@hyyk
ho cp /home/oracle/control01.ctl /u01/app/oracle/oradata/hyyk/control02.ctl
将数据库 mount 阶段
SYS@hyyk
alter database mount;
将数据库打开
SYS@hyyk
alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for
database open
SYS@hyyk
alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1:
/u01/app/oracle/oradata/hyyk/system01.dbf
查看当前正在使用的日志
SYS@hyyk select * from v$log;
GROUP# THREAD# SEQUENCE#
BYTES BLOCKSIZE MEMBERS ARC
———- ———- ———- ———-
———- ———- —
STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE#
NEXT_TIME
—————- ————- ———
———— ———
1 1 1
52428800 512 1 YES
INACTIVE 1347611 05-NOV-17 1354710 05-NOV-17
3 1 3
52428800 512 1 NO
CURRENT
1358125 05-NOV-17 2.8147E+14
2 1 2
52428800 512 1 YES
INACTIVE 1354710 05-NOV-17 1358125 05-NOV-17
恢复当前的数据库
SYS@hyyk
recover database using backup controlfile;
ORA-00279: change 1358125 generated at 11/05/2017 12:37:33
needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/archive/arch_1_959256089_3.log
ORA-00280: change 1358125 for thread 1 is in sequence #3
// 这里查看是否存在归档日志，如果存在下面选择 auto，如果不存在就输入当前的 rodo log
Specify log: {RET =suggested |
filename | AUTO | CANCEL}
/u01/app/oracle/oradata/hyyk/redo03.log
ORA-00283: recovery session canceled due to errors
ORA-01244: unnamed datafile(s) added to control file by media
recovery
ORA-01110: data file 7: /u01/app/oracle/oradata/hyyk/t2.dbf
ORA-01112: media recovery not started
SYS@hyyk
select name from v$datafile;
NAME
——————————————————————————–
/u01/app/oracle/oradata/hyyk/system01.dbf
/u01/app/oracle/oradata/hyyk/sysaux01.dbf
/u01/app/oracle/oradata/hyyk/undotbs01.dbf
/u01/app/oracle/oradata/hyyk/users01.dbf
/u01/app/oracle/oradata/hyyk/example01.dbf
/u01/app/oracle/oradata/hyyk/t1.dbf
/u01/app/oracle/product/11.2.0/dbhome_1/dbs/UNNAMED00007
数据文件改名
SYS@hyyk
alter database create datafile /u01/app/oracle/product/11.2.0/dbhome_1/dbs/UNNAMED00007
as
2
/u01/app/oracle/oradata/hyyk/t2.dbf
9. 恢复数据库
SYS@hyyk
recover database using backup controlfile;
ORA-00279: change 1364363 generated at
11/05/2017 13:51:22 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/archive/arch_1_959256089_3.log
ORA-00280: change 1364363 for thread 1 is
in sequence #3
Specify log: {RET =suggested |
filename | AUTO | CANCEL}
/u01/app/oracle/oradata/hyyk/redo03.log
Log applied.
Media recovery complete.
SYS@hyyk
alter database open resetlogs;
Database altered.
查看数据文件
SYS@hyyk
select name from v$datafile;
NAME
——————————————————————————–
/u01/app/oracle/oradata/hyyk/system01.dbf
/u01/app/oracle/oradata/hyyk/sysaux01.dbf
/u01/app/oracle/oradata/hyyk/undotbs01.dbf
/u01/app/oracle/oradata/hyyk/users01.dbf
/u01/app/oracle/oradata/hyyk/example01.dbf
/u01/app/oracle/oradata/hyyk/t1.dbf
/u01/app/oracle/oradata/hyyk/t2.dbf
7 rows selected.
SYS@hyyk select * from b;
ID
———-
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