oracle教程之oralce非归档模式下的恢复（一）
案例1： 历史日志没有被覆盖（可以完全恢复）
1）切换到非归档模式
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /disk1/arch/anny
Oldest online log sequence 7
Next log sequence to archive 10
Current log sequence 10
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 314572800 bytes
Fixed Size 1279964 bytes
Variable Size 58722340 bytes
Database Buffers 251658240 bytes
Redo Buffers 2912256 bytes
Database mounted.
SQL> alter database noarchivelog;
Database altered.
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination /disk1/arch/anny
Oldest online log sequence 7
Current log sequence 10
SQL> !
[oracle@solaris10 ~]$rm /disk1/backup/anny/cold_bak/*
[oracle@solaris10 ~]$rm /disk1/arch/anny/*
[oracle@solaris10 ~]$exit
exit
2）重新做数据库的全备（一致性备份-冷备份）
-------备份所有的datafile 和 controlfile
SQL> @/export/home/oracle/sqlplus/anny_cold_bak ――执行冷备份脚本
3）模拟环境
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARCHIVED STATUS FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --------- ---------- ------------- -------------------
1 1 10 104857600 3 NO CURRENT 845923 2012-03-22 14:53:47
4 1 8 104857600 3 YES INACTIVE 801096 2012-03-21 18:22:29
3 1 9 104857600 3 YES INACTIVE 821972 2012-03-22 11:42:07
2 1 7 104857600 3 YES INACTIVE 779349 2012-03-21 17:13:00
4 rows selected.
SQL> select * from scott.tb01;
ID
----------
111
222
333
3 rows selected.
SQL> insert into scott.tb01 values (444);
1 row created.
SQL> insert into scott.tb01 values (555);
1 row created.
SQL> insert into scott.tb01 values (666);
1 row created.
SQL> commit;
Commit complete.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARCHIVED STATUS FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --------- ---------- ------------- -------------------
1 1 10 104857600 3 NO CURRENT 845923 2012-03-22 14:53:47
4 1 8 104857600 3 YES INACTIVE 801096 2012-03-21 18:22:29
3 1 9 104857600 3 YES INACTIVE 821972 2012-03-22 11:42:07
2 1 7 104857600 3 YES INACTIVE 779349 2012-03-21 17:13:00
4 rows selected.
SQL> select segment_name,tablespace_name from dba_segments where segment_name='TB01';
SEGMENT_NAME TABLESPACE_NAME
--------------- --------------------
TB01 TEST
1 row selected.
SQL> SHUTDOWN ABORT
ORACLE instance shut down.
4) 删除数据文件
[oracle@solaris10 ~]$rm /u01/app/oracle/oradata/anny/test*.dbf
5）启动数据库
SQL> startup
ORACLE instance started.
Total System Global Area 314572800 bytes
Fixed Size 1279964 bytes
Variable Size 58722340 bytes
Database Buffers 251658240 bytes
Redo Buffers 2912256 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 5 - see DBWR trace file
ORA-01110: data file 5: '/u01/app/oracle/oradata/anny/test01.dbf'
SQL> select file#,error from V$recover_file;
FILE# ERROR
---------- -----------------------------------------------------------------
5 FILE NOT FOUND
11 FILE NOT FOUND
6）恢复
――restore datafile
[oracle@solaris10 ~]$cp /disk1/backup/anny/cold_bak/test*.dbf /u01/app/oracle/oradata/anny/
――recover datafile
SQL> recover datafile 5,11
Media recovery complete.
告警日志信息：
ALTER DATABASE RECOVER datafile 5,11
Thu Mar 22 15:21:26 2012
Media Recovery Start
Thu Mar 22 15:21:26 2012
Recovery of Online Redo Log: Thread 1 Group 1 Seq 10 Reading mem 0
Mem# 0 errs 0: /disk3/oradata/anny/redo01a.log
Mem# 1 errs 0: /disk1/oradata/anny/redo01b.log
Mem# 2 errs 0: /disk2/oradata/anny/redo01c.log
Thu Mar 22 15:21:27 2012
Media Recovery Complete (anny)
Completed: ALTER DATABASE RECOVER datafile 5,11
5）验证
SQL> alter database open;
Database altered.
SQL> select * from scott.tb01;
ID
----------
444
555
666
111
222
333
6 rows selected.――完全恢复
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