［实验-视频过程］oracle热备份-单个表空间-备份和恢复操作演示

针对一个表空间的恢复

1、创建表空间

drop tablespace test_backup  including contents and datafiles;

CREATE TABLESPACE test_backup DATAFILE '/u01/app/oracle/oradata/orcl/test_back.dbf' SIZE 10M  autoextend on;

2、写入测试数据，创建测试表

drop table test_backup purge; CREATE TABLE test_backup ( aa NUMBER, bb VARCHAR2(10) ) TABLESPACE test_backup;

3、插入测试数据，第一条。

 insert into test_backup values (1,'test_back1'); commit;

4、将数据库设置备份模式

SQL> ALTER TABLESPACE test_backup BEGIN BACKUP; Tablespace altered.

5、拷贝数据文件至备份文件中

host cp /u01/app/oracle/oradata/orcl/test_back.dbf /home/backup/xuejiayue/ 

6、结束备份模式

SQL> ALTER TABLESPACE test_backup END BACKUP; Tablespace altered.

7、切换日志

SQL> ALTER SYSTEM SWITCH LOGFILE; System altered.

8、此时再插入数据，插入第二条数据（此时已经备份完成）。

SQL> insert into test_backup values (2,'test_back2'); 1 row created. SQL> commit; Commit complete.

9、模拟故障，删除数据库文件

host rm -rf /u01/app/oracle/oradata/orcl/test_back.dbf

10、重启数据库

SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. startup 

11、测试数据表，应该报数据文件错误

SQL> select * from test_backup; select * from test_backup * ERROR at line 1: ORA-00376: file 6 cannot be read at this time ORA-01110: data file 6: '/u01/app/oracle/oradata/orcl/test_back.dbf'

12、恢复数据库单个表空间数据库文件。

SQL> ALTER DATABASE DATAFILE 6 OFFLINE DROP 2 ; Database altered. SQL> host cp /home/backup/xuejiayue/test_back.dbf /u01/app/oracle/oradata/orcl/test_back.dbf SQL> RECOVER DATAFILE 6 Media recovery complete. SQL> ALTER DATABASE DATAFILE 6 ONLINE; Database altered.

12、恢复完成，测试数据。

SQL> select * from test_backup; AA BB ---------- ---------- 1 test_back1 2 test_back2

结果是：两条数据文件都在！！！

视频地址
http://v.youku.com/v_show/id_XMTM2MzI0NjcyMA==.html