oracle数据库备份与恢复 a piece of cake (3)

Oracle数据库在线备份：（windows平台）

1. 检查你的数据库是否运行在Archive模式下。
以system连接数据库运行以下的查询语句。
SQL> select name,log_mode from v$database;
NAME      LOG_MODE
--------- ------------
DEMO      ARCHIVELOG
    假如你的log_mode显示为archivelog， OK你的数据库可以进行在线的备份。否则参考文档修改数据为archive mode。

2. 建立教本治理目录 C:\oracle\admin\admin script
3. 建立数据库备份的脚本
在上面建立的目录下建立如下的两个脚本。
3.1 建立执行备份任务的脚本(批处理文件）
    文件内容如下：

    @echo OFF
Rem ===========================================================================
Rem  NAME     - Open_Backup_Run.bat
Rem  FUNCTION - Creates a backup script for a User Managed backup
Rem  NOTES    - This script will create a script and run OS copy commands
Rem             on closed (cold) database
Rem  MODIFIED - Tianliang Guo    02/08/12
Rem ===========================================================================

Rem  For Windows, set environment variables for the root path.
set ORACLE_SID=TSTDB
set ORACLE_CONNECTSTRING=tstdb
set ORACLE_BASE=c:\oracle
set ORACLE_HOME=%ORACLE_BASE%\ora81
set ORACLE_DATA=%ORACLE_BASE%\oradata\%ORACLE_SID%
set ORACLE_ADMIN=%ORACLE_BASE%\admin\%ORACLE_SID%

%ORACLE_HOME%\bin\sqlplus /nolog @Open_Backup.sql > Open_Backup.sql.log

3.2 建立完成备份认为的命令文件(sqlplus内执行的sql脚本）
文件内容如下：

Rem =====================================================================================
Rem  NAME     - Open_Backup.sql
Rem  FUNCTION - Creates a backup command file for a User Managed Open database backup
Rem  NOTES    - This script will create a script and run OS copy commands
Rem             on an open (hot) database. The datafile backups will be inconsistent.

Rem  MODIFIED - Mr. Tianliang Guo       2002/08/11
Rem =====================================================================================

Rem
Rem Set SQL*Plus variables to manipulate output
Rem

set heading off
set pagesize 0
set linesize 600
set verify off
set trimspool on
set feedback off

Rem Set SQL*Plus user variables used in script

define adm = 'sys'
define pwd = 'oracle8i'

Rem Windows User variables
define dir = 'C:\oracle\admin\TSTDB\backup'
define fil = 'open_backup_commands.sql'
define spo = 'open_backup_output.lst'
define ctl = '&dir\control.ctl'
define cpy = 'ocopy'

Rem login database
connect &adm/&pwd as sysdba;

Rem Create a file containing all the file copy commands needed for open user managed backup

set serveroutput on
spool &fil
prompt spool &spo
prompt archive log list;;
prompt alter system switch logfile;;
prompt alter system archive log all;;

DECLARE
CURSOR cur_tablespace IS
  SELECT tablespace_name
    FROM dba_tablespaces;

CURSOR cur_datafile (tn VARCHAR) IS
  SELECT file_name
    FROM dba_data_files
   WHERE tablespace_name = tn;
BEGIN
  FOR ct IN cur_tablespace LOOP
    dbms_output.put_line ('alter tablespace 'ct.tablespace_name' begin backup;');
    FOR cd IN cur_datafile (ct.tablespace_name) LOOP
  dbms_output.put_line ('host &cpy 'cd.file_name' &dir');
    END LOOP;
    dbms_output.put_line ('alter tablespace 'ct.tablespace_name' end backup;');
  END LOOP;

END;
/

prompt alter system switch logfile;;
prompt alter database backup controlfile to '&ctl' REUSE;;

prompt alter database backup controlfile to trace;;

prompt archive log list;;
prompt spool off
spool off;

Rem Run the copy file commands from the operating system
@&

exit;

4. 修改教本定义的变量
在运行教本中定义的一些变量，将其改为本地数据库安装环境的变量。
需要修改的变量有,
在close_Backup_run.bat脚本中：
  set ORACLE_SID=TSTDB
  set ORACLE_CONNECTSTRING=tstdb
  set ORACLE_BASE=c:\oracle
  set ORACLE_HOME=%ORACLE_BASE%\ora81
在close_backup.sql脚本中：
  define adm = 'sys'
  define pwd = 'oracle8i'
  define dir = 'C:\oracle\admin\TSTDB\backup'
  define ctl = '&dir\control.ctl'

5. 执行数据库备份任务
在$ORACLE_BASE\admin\admin_script目录下运行open_Backup_run.bat

6. 执行自动备份
在windows系统中添加计划任务，定期运行open_Backup_run.bat

假如你有问题可以联系：
站内的短信：ganku
mail： peter_guo@pub.szedi.com.cn
   guo_tianliang@yahoo.com