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。
down normal或shutdown immediate关闭数据库
le@jumper oracle]$ sqlplus "/ as sysdba"
*Plus: Release - Production on Sat Oct 15 15:48:36 2005
right (c) 1982, 2002, Oracle Corporation. All rights reserved.
ected to:
le9i Enterprise Edition Release - Production
the Partitioning option
ver Release - Production
> shutdown immediate;
base closed.
base dismounted.
LE instance shut down.
2.启动数据库到mount状态
> startup mount;
LE instance started.
l System Global Area 101782828 bytes
d Size 451884 bytes
able Size 37748736 bytes
base Buffers 62914560 bytes
Buffers 667648 bytes
base 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
r database archivelog 命令。
> alter database archivelog;
base altered.
> alter database open;
base altered.
> archive log list;
base log mode Archive Mode
matic archival Enabled
ive destination /opt/oracle/oradata/conner/archive
st online log sequence 148
log sequence to archive 151
ent log sequence 151
