ARCHIVELOG模式下用户管理恢复控制文件（2）——使用trace文件重建控制文件！
首先生成控制文件的sql脚本
SQL> alter database backup controlfile to trace as '/u01/app/oracle/controlfile/control.sql'; 数据库已更改。
其实就是生成了一个控制文件的脚本，去掉注释以后这个sql脚本的内容如下：
--#1. NORESETLOGS case
STARTUP NOMOUNT;
CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/u01/app/oracle/oradata/orcl/redo01.log' SIZE 50M,
GROUP 2 '/u01/app/oracle/oradata/orcl/redo02.log' SIZE 50M,
GROUP 3 '/u01/app/oracle/oradata/orcl/redo03.log' SIZE 50M
DATAFILE
'/u01/app/oracle/oradata/orcl/system01.dbf',
'/u01/app/oracle/oradata/orcl/undotbs01.dbf',
'/u01/app/oracle/oradata/orcl/sysaux01.dbf',
'/u01/app/oracle/oradata/orcl/users01.dbf',
'/u01/app/oracle/oradata/orcl/tb1.dbf'
CHARACTER SET ZHS16GBK;
RECOVER DATABASE;
ALTER SYSTEM ARCHIVE LOG ALL;
ALTER DATABASE OPEN;
ALTER TABLESPACE TEMP ADD TEMPFILE '/u01/app/oracle/oradata/orcl/temp01.dbf' SIZE 20971520 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M;
--#2. RESETLOGS case
STARTUP NOMOUNT;
CREATE CONTROLFILE REUSE DATABASE "ORCL" RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/u01/app/oracle/oradata/orcl/redo01.log' SIZE 50M,
GROUP 2 '/u01/app/oracle/oradata/orcl/redo02.log' SIZE 50M,
GROUP 3 '/u01/app/oracle/oradata/orcl/redo03.log' SIZE 50M
DATAFILE
'/u01/app/oracle/oradata/orcl/system01.dbf',
'/u01/app/oracle/oradata/orcl/undotbs01.dbf',
'/u01/app/oracle/oradata/orcl/sysaux01.dbf',
'/u01/app/oracle/oradata/orcl/users01.dbf',
'/u01/app/oracle/oradata/orcl/tb1.dbf'
CHARACTER SET ZHS16GBK;
RECOVER DATABASE USING BACKUP CONTROLFILE;
ALTER DATABASE OPEN RESETLOGS;
ALTER TABLESPACE TEMP ADD TEMPFILE '/u01/app/oracle/oradata/orcl/temp01.dbf' SIZE 20971520 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M;
然后删除数据库模拟控制控制文件丢失
SQL> conn /as sysdba
已连接到空闲例程。
SQL> startup
ORACLE 例程已经启动。
Total System Global Area 167772160 bytes
Fixed Size 1266392 bytes
Variable Size 62917928 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
数据库装载完毕。
数据库已经打开。
SQL> conn u1/u1
已连接。
SQL> select * from t;
ID VALUE
---------- ----------
1 a
SQL> insert into t values(2,'b');
已创建 1 行。
SQL> commit;
提交完成。
SQL> select * from t;
ID VALUE
---------- ----------
1 a
2 b
SQL> ! rm -rf /u01/app/oracle/oradata/orcl/*.ctl
SQL> conn /as sysdba
已连接。
SQL> shutdown abort
ORACLE 例程已经关闭。
1、下面就删除控制文件用这个脚本来重建控制文件。使用noresetlogs。
SQL> conn /as sysdba
已连接到空闲例程。
SQL> startup nomount
ORACLE 例程已经启动。
Total System Global Area 167772160 bytes
Fixed Size 1266392 bytes
Variable Size 62917928 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS ARCHIVELOG
2 MAXLOGFILES 16
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 100
5 MAXINSTANCES 8
6 MAXLOGHISTORY 292
7 LOGFILE
8 GROUP 1 '/u01/app/oracle/oradata/orcl/redo01.log' SIZE 50M,
9 GROUP 2 '/u01/app/oracle/oradata/orcl/redo02.log' SIZE 50M,
10 GROUP 3 '/u01/app/oracle/oradata/orcl/redo03.log' SIZE 50M
11 DATAFILE
12 '/u01/app/oracle/oradata/orcl/system01.dbf',
13 '/u01/app/oracle/oradata/orcl/undotbs01.dbf',
14 '/u01/app/oracle/oradata/orcl/sysaux01.dbf',
15 '/u01/app/oracle/oradata/orcl/users01.dbf',
16 '/u01/app/oracle/oradata/orcl/tb1.dbf'
17 CHARACTER SET ZHS16GBK;
控制文件已创建。
SQL> select status from v$instance;
STATUS
------------
MOUNTED
SQL> select * from v$recover_file;
FILE# ONLINE ONLINE_ ERROR CHANGE# TIME
---------- ------- ------- ----------------------------------------------------------------- ---------- --------------
1 ONLINE ONLINE 474731 10-10? -11
2 ONLINE ONLINE 474731 10-10? -11
3 ONLINE ONLINE 474731 10-10? -11
4 ONLINE ONLINE 474731 10-10? -11
5 ONLINE ONLINE 474731 10-10? -11
SQL> alter database open;
alter database open
*
第 1 行出现错误:
ORA-01113: ?? 1 ??????
ORA-01110: ???? 1: '/u01/app/oracle/oradata/orcl/system01.dbf'
SQL> RECOVER DATABASE;
完成介质恢复。
SQL> ALTER SYSTEM ARCHIVE LOG ALL;
系统已更改。
SQL> ALTER DATABASE OPEN;
数据库已更改。
SQL> ALTER TABLESPACE TEMP ADD TEMPFILE '/u01/app/oracle/oradata/orcl/temp01.dbf' SIZE 20971520 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M;
表空间已更改。
SQL> select status from v$instance;
STATUS
------------
OPEN
SQL> select * from v$recover_file;
未选定行
SQL> conn u1/u1
已连接。
SQL> select * from t;
ID VALUE
---------- ----------
1 a
2、重复前面的实验环境。使用resetlogs。
SQL> conn /as sysdba
已连接到空闲例程。
SQL> startup nomount;
ORACLE 例程已经启动。
Total System Global Area 167772160 bytes
Fixed Size 1266392 bytes
Variable Size 62917928 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "ORCL" RESETLOGS ARCHIVELOG
2 MAXLOGFILES 16
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 100
5 MAXINSTANCES 8
6 MAXLOGHISTORY 292
7 LOGFILE
8 GROUP 1 '/u01/app/oracle/oradata/orcl/redo01.log' SIZE 50M,
9 GROUP 2 '/u01/app/oracle/oradata/orcl/redo02.log' SIZE 50M,
10 GROUP 3 '/u01/app/oracle/oradata/orcl/redo03.log' SIZE 50M
11 DATAFILE
12 '/u01/app/oracle/oradata/orcl/system01.dbf',
13 '/u01/app/oracle/oradata/orcl/undotbs01.dbf',
14 '/u01/app/oracle/oradata/orcl/sysaux01.dbf',
15 '/u01/app/oracle/oradata/orcl/users01.dbf',
16 '/u01/app/oracle/oradata/orcl/tb1.dbf'
17 CHARACTER SET ZHS16GBK;
控制文件已创建。
SQL> select status from v$instance;
STATUS
------------
MOUNTED
SQL> select * from v$recover_file;
FILE# ONLINE ONLINE_ ERROR CHANGE# TIME
---------- ------- ------- ----------------------------------------------------------------- ---------- --------------
1 ONLINE ONLINE 474731 10-10? -11
2 ONLINE ONLINE 474731 10-10? -11
3 ONLINE ONLINE 474731 10-10? -11
4 ONLINE ONLINE 474731 10-10? -11
5 ONLINE ONLINE 474731 10-10? -11
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------------
1 1 0 52428800 1 YES UNUSED 0
3 1 0 52428800 1 YES CURRENT 0
2 1 0 52428800 1 YES UNUSED 0
SQL> select member from v$logfile;
MEMBER
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/redo03.log
/u01/app/oracle/oradata/orcl/redo02.log
/u01/app/oracle/oradata/orcl/redo01.log
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE;
ORA-00279: ?? 474731 (? 10/10/2011 02:31:58 ??) ???? 1 ????
ORA-00289: ??: /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2011_10_10/o1_mf_1_14_%u_.arc
ORA-00280: ?? 474731 (???? 1) ??? #14 ?
指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/app/oracle/oradata/orcl/redo03.log
ORA-00310: ???????? 12; ???? 14
ORA-00334: ????: '/u01/app/oracle/oradata/orcl/redo03.log'
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE;
ORA-00279: ?? 474731 (? 10/10/2011 02:31:58 ??) ???? 1 ????
ORA-00289: ??: /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2011_10_10/o1_mf_1_14_%u_.arc
ORA-00280: ?? 474731 (???? 1) ??? #14 ?
指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/app/oracle/oradata/orcl/redo01.log
ORA-00310: ???????? 13; ???? 14
ORA-00334: ????: '/u01/app/oracle/oradata/orcl/redo01.log'
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE;
ORA-00279: ?? 474731 (? 10/10/2011 02:31:58 ??) ???? 1 ????
ORA-00289: ??: /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2011_10_10/o1_mf_1_14_%u_.arc
ORA-00280: ?? 474731 (???? 1) ??? #14 ?
指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/app/oracle/oradata/orcl/redo02.log
已应用的日志。
完成介质恢复。
SQL> select * from v$recover_file;
未选定行
SQL> ALTER DATABASE OPEN RESETLOGS;
数据库已更改。
SQL> ALTER TABLESPACE TEMP ADD TEMPFILE '/u01/app/oracle/oradata/orcl/temp01.dbf' SIZE 20971520 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M;
表空间已更改。
SQL> select status from v$instance;
STATUS
------------
OPEN
SQL> conn u1/u1
已连接。
SQL> select * from t;
ID VALUE
---------- ----------
1 a
2 b
指定RESETLOGS会执行下列操作：归档当前的在线重做日志文件（如果能访问到的话），然后清空内容并将日志文件序号重置为1（如果在线重做日志文件不存在，则重建）。重置控制文件中关于在线日志文件的元数据。更新数据文件和在线重做日志文件中的RESETLOGS SCN和重置时间信息。
SQL> conn /as sysdba
已连接。
SQL> alter system switch logfile;
系统已更改。
SQL> /
系统已更改。
SQL> /
系统已更改。
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------------
1 1 4 52428800 1 NO CURRENT 474954 10-10月-11
2 1 2 52428800 1 YES INACTIVE 474948 10-10月-11
3 1 3 52428800 1 YES INACTIVE 474950 10-10月-11