非归档模式切换为归档模式

• 查看现有状态
• 以下步骤
• 1 确定归档日志的路径
• 2 关闭数据库
• 3 启动数据mount状态
• 4 修改数据库为归档模式
• 5 打开数据库
• 6 修改日志文件命名格式
• 7 查询

查看现有状态

首先查看数据库现有模式可使用以下语句
select name,log_mode from v$database;
也可以用下面的语句

[oracle@ZHUANHU ~]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Thu Dec 27 11:03:07 2018

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

SQL> archive log list
Database log mode              No Archive Mode
Automatic archival             Disabled
Archive destination            USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     252
Current log sequence           254
SQL> select name,log_mode from v$database;

NAME      LOG_MODE
--------- ------------
ZHDB      NOARCHIVELOG

以下步骤

1 确定归档日志的路径

SQL> alter system set log_archive_dest_1='location=/u01/app/oracle/archive_log';

System altered.

2 关闭数据库

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

3 启动数据mount状态

SQL> startup mount
ORACLE instance started.

Total System Global Area  599785472 bytes
Fixed Size                  2022632 bytes
Variable Size             243270424 bytes
Database Buffers          352321536 bytes
Redo Buffers                2170880 bytes
Database mounted.

4 修改数据库为归档模式

SQL> alter database archivelog;

Database altered.

5 打开数据库

SQL> alter database open;

Database altered.

6 修改日志文件命名格式

SQL> alter system set log_archive_max_processes=5;

System altered.

SQL> alter system set log_archive_format="archive_%t_%s_%r.log" scope=spfile;

System altered.

7 查询

SQL> archive log list
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            /u01/app/oracle/archive_log
Oldest online log sequence     252
Next log sequence to archive   254
Current log sequence           254
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut dow
1fff8
n.
SQL> startup
ORACLE instance started.

Total System Global Area  599785472 bytes
Fixed Size                  2022632 bytes
Variable Size             247464728 bytes
Database Buffers          348127232 bytes
Redo Buffers                2170880 bytes
Database mounted.
Database opened.
SQL> alter system switch logfile;

System altered.

SQL> !ls
archive_1_256_974460126.log