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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: {=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: {=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: {=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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