Question

如何启动或关闭数据库的归档模式

Answer 1

Oracle数据库可以运行在2种模式：归档模式(archivelog)和非归档模式(noarchivelog)归档模式可以提高Oracle数据库的可恢复性，生产数据库都应该运行在此模式下，归档模式应该和相应的备份策略相结合，只有归档模式没有相应的备份策略只会带来麻烦。
　　下面为大家简单介绍如何启用和关闭数据库的归档模式。

　　1.shutdown normal或shutdown immediate关闭数据库

　　[oracle@jumper oracle]$ sqlplus "/ as sysdba"

　　SQL*Plus: Release 9.2.0.4.0 - Production on Sat Oct 15 15:48:36 2005

　　Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

　　Connected to:

　　Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production

　　With the Partitioning option

　　JServer Release 9.2.0.4.0 - Production

　　SQL> shutdown immediate;

　　Database closed.

　　Database dismounted.

　　ORACLE instance shut down.

　　2.启动数据库到mount状态

　　SQL> startup mount;

　　ORACLE instance started.

　　Total System Global Area 101782828 bytes

　　Fixed Size 451884 bytes

　　Variable Size 37748736 bytes

　　Database Buffers 62914560 bytes

　　Redo Buffers 667648 bytes

　　Database mounted.

　　3.启用或停止归档模式

　　如果要启用归档模式，此处使用

　　alter database archivelog 命令。

　　SQL> alter database archivelog;

　　Database altered.

　　SQL> alter database open;

　　Database altered.

　　SQL> archive log list;

　　Database log mode Archive Mode

　　Automatic archival Enabled

　　Archive destination /opt/oracle/oradata/conner/archive

　　Oldest online log sequence 148

　　Next log sequence to archive 151
　　Current log sequence 151

Answer 2

1.管理员身份连接数据库

C:\Users\Administrator>sqlplus sys/sys@prjdb as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Tue Jun 17 23:50:55 2014

Copyright (c) 1982, 2010, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

2.查看当前归档模式，是归档还是非归档
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 228
Current log sequence 230

3.关闭数据库
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

4.启动数据库到mount状态

SQL> startup mount;
ORACLE instance started.

Total System Global Area 3423965184 bytes
Fixed Size 2180544 bytes
Variable Size 2013268544 bytes
Database Buffers 1392508928 bytes
Redo Buffers 16007168 bytes
Database mounted.

5.启动归档模式

SQL> alter database archivelog;

Database altered.

SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 228
Next log sequence to archive 230
Current log sequence 230

6.启动数据库
SQL> alter database open;
Database altered.

7.关闭归档模式

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

Total System Global Area 3423965184 bytes
Fixed Size 2180544 bytes
Variable Size 2013268544 bytes
Database Buffers 1392508928 bytes
Redo Buffers 16007168 bytes
Database mounted.
SQL> alter database noarchivelog;

Database altered.

SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 228
Current log sequence 230
SQL>