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Litteratur Hotgirlsfilm Hot Girls Film Hot Girls Film Ca Template:Atlantic Coast Conference Hot Girls Film oracle snapcf_.f/ SNAPSHOT CONTROLFILE 什么作用？ | ANBOB

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下面仍是在数据库正常运行情况下，将控制文件删除，仍测试直接copy SNAPSHOT CONTROLFILE 的恢复方式：
SQL> insert into test(no) values(5);

1 row created.

SQL> commit;

Commit complete.

SQL>
SQL> !
$ pwd
/u01/ora9a/oradata/tt9a
$ ls
control01.ctl control0t.ctl example01.dbf redo01.log system01.dbf undotbs01.dbf
control02.ctl cwmlite01.dbf indx01.dbf redo02.log temp01.dbf users01.dbf
control03.ctl drsys01.dbf odm01.dbf redo03.log tools01.dbf xdb01.dbf
$ rm contr*
$ ls
cwmlite01.dbf example01.dbf odm01.dbf redo02.log system01.dbf tools01.dbf users01.dbf
drsys01.dbf indx01.dbf redo01.log redo03.log temp01.dbf undotbs01.dbf xdb01.dbf
$
$ exit

SQL> select * from v$controlfile;

STATUS
———————
NAME
——————————————————————————–

/u01/ora9a/oradata/tt9a/control01.ctl
/u01/ora9a/oradata/tt9a/control02.ctl
/u01/ora9a/oradata/tt9a/control03.ctl
SQL> select dbid from v$database;
select dbid from v$database
*
ERROR at line 1:
ORA-00210: cannot open the specified controlfile
ORA-00202: controlfile: ‘/u01/ora9a/oradata/tt9a/control01.ctl’
ORA-27041: unable to open file
IBM AIX RISC System/6000 Error: 2: No such file or directory
Additional information: 3

SQL>
没有控制文件，查询失败
现在将SNAPSHOT CONTROLFILE copy到对应目录，尝试直接恢复成控制文件:
SQL> !
$ pwd
/u01/ora9a/oradata/tt9a
$ cp /u01/ora9a/product/9.2/dbs/snapcf_tt9a.f control01.ctl
$ cp control01.ctl control02.ctl
$ cp control01.ctl control03.ctl
$ ls -lrt cont*
-rw-r—– 1 ora9a dba 1531904 Feb 24 10:55 control01.ctl
-rw-r—– 1 ora9a dba 1531904 Feb 24 10:55 control02.ctl
-rw-r—– 1 ora9a dba 1531904 Feb 24 10:55 control03.ctl
$
注意，此时不要起停数据库，否则这样恢复的控制文件仍不可用
尝试查询control file信息
SQL> select dbid from v$database;

DBID
———-
3459515476

SQL>
ok,成功
查询数据文件头信息
SQL> select CHECKPOINT_CHANGE# from v$datafile_header;
select CHECKPOINT_CHANGE# from v$datafile_header
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [2170], [], [], [], [], [], [], []

SQL>
失败
现在重新启动数据库，看看是否可以到mount状态：
SQL> shutdown immediate
ORA-00600: internal error code, arguments: [kccchb_1], [356], [353], [0], [353], [0], [], []
SQL> shutdown abort;
ORACLE instance shut down.
SQL>
SQL> startup
ORACLE instance started.

Total System Global Area 320569400 bytes
Fixed Size 741432 bytes
Variable Size 285212672 bytes
Database Buffers 33554432 bytes
Redo Buffers 1060864 bytes
Database mounted.
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL>
ok，此时数据库可以mount起来了

SQL>
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;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: ‘/u01/ora9a/oradata/tt9a/system01.dbf’
提示需要恢复
SQL> recover database using backup controlfile;
ORA-00279: change 349227 generated at 02/24/2009 10:49:58 needed for thread 1
ORA-00289: suggestion : /u01/arch/1_1.dbf
ORA-00280: change 349227 for thread 1 is in sequence #1
Specify log: {}
AUTO
ORA-00328: archived log ends at change 347581, need later change 349227
ORA-00334: archived log: ‘/u01/arch/1_1.dbf’
SQL> recover database using backup controlfile;
ORA-00279: change 349227 generated at 02/24/2009 10:49:58 needed for thread 1
ORA-00289: suggestion : /u01/arch/1_1.dbf
ORA-00280: change 349227 for thread 1 is in sequence #1
Specify log: {}
/u01/ora9a/oradata/tt9a/redo01.log
Log applied.
Media recovery complete.

SQL> alter database open resetlogs;

Database altered.

SQL>
恢复成功
SQL> select no,to_char(vdate,’yyyy-mm-dd hh24:mi:ss’) from test order by vdate;

NO TO_CHAR(VDATE,’YYYY-MM-DDHH24:MI:SS’)
———- ———————————————————
1 2009-02-24 10:16:09
2 2009-02-24 10:25:30
3 2009-02-24 10:26:56
4 2009-02-24 10:30:59
5 2009-02-24 10:51:01

SQL>
ok,新插入的数据也在。