以下的文章主要讲述的是正确的启动或是关闭Oracle归档模式的实际操作步骤，我们大家都知道Oracle数据库运行于2种模式，主要实施Oracle归档模式(archivelog)与非归档模式(noarchivelog)。
Oracle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。
1.shutdown normal或shutdown immediate关闭数据库
1.oracle@jumper oracle]$ sqlplus "/ as sysdba"
2.SQL*Plus: Release 9.2.0.4.0 - Production on Sat Oct 15 15:48:36 2005
3.Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
4.Connected to:
5.Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
6.With the Partitioning option
7.JServer Release 9.2.0.4.0 - Production
8.SQL> shutdown immediate;
9.Database closed.
10.Database dismounted.
11.ORACLE instance shut down.
2.启动数据库到mount状态
1.SQL> startup mount;
2.ORACLE instance started.
3.Total System Global Area 101782828 bytes
4.Fixed Size 451884 bytes
5.Variable Size 37748736 bytes
6.Database Buffers 62914560 bytes
7.Redo Buffers 667648 bytes
8.Database mounted.
3.启用或停止归档模式
如果要启用Oracle归档模式，此处使用
1.alter database archivelog 命令。
2.SQL> alter database archivelog;
3.Database altered.
4.SQL> alter database open;
5.Database altered.
6.SQL> archive log list;
7.Database log mode Archive Mode
8.Automatic archival Enabled
9.Archive destination /opt/oracle/oradata/conner/archive
10.Oldest online log sequence 148
11.Next log sequence to archive 151
12.Current log sequence 151
