Oracle数据库可以运行在种模式下: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
本文简单介绍如何启用和关闭数据库的归档模式
shutdown normal或shutdown immediate关闭数据库
[oracle@jumper oracle]$ sqlplus / as sysdba
SQL*Plus: Release Production on Sat Oct ::
Copyright (c) Oracle Corporation All rights reserved
Connected to:
Oraclei Enterprise Edition Release Production
With the Partitioning option
JServer Release Production
SQL> shutdown immediate;
Database closed
Database dismounted
ORACLE instance shut down
启动数据库到mount状态
SQL> startup mount;
ORACLE instance started
Total System Global Area bytes
Fixed Size bytes
Variable Size bytes
Database Buffers bytes
Redo Buffers bytes
Database mounted
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
Next log sequence to archive
Current log sequence
如果需要停止归档模式此处使用
alter database noarchivelog 命令
SQL> shutdown immediate;
Database closed
Database dismounted
ORACLE instance shut down
SQL> startup mount;
ORACLE instance started
Total System Global Area bytes
Fixed Size bytes
Variable Size bytes
Database Buffers bytes
Redo Buffers bytes
Database mounted
SQL> alter database noarchivelog;
Database altered
SQL> alter database open;
Database altered
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Enabled
Archive destination /opt/oracle/oradata/conner/archive
Oldest online log sequence
Current log sequence
修改相应的初始化参数
Oracleg之前你还需要修改初始化参数使数据库处于自动归档模式
在pfile/spfile中设置如下参数
log_archive_start = true
重启数据库此参数生效此时数据库处于自动归档模式
也可以在数据库启动过程中手工执行
archive log start
使数据库启用自动归档但是重启后数据库仍然处于手工归档模式
