centos7 oracle 开启redolog方法

环境准备

centos版本：centos 7

oracle版本：oracle 12c

1.管理员身份连接数据库

[code]sqlplus sys/sys@oratest as sysdba

2.查看当前归档模式，是归档还是非归档

[code]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

[code]SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

4.启动数据库到mount状态

[code]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

[code]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

[code]SQL> alter database open;
Database altered.

7.关闭归档模式

[code]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>

8.开启附加日志

[code]alter database add supplemental log data;