Archive mode for enabling and disabling Oracle databases

We all know that Oracle databases can run in two modes: archivelog and noarchivelog. The Archive mode is mainly used to improve the recoverability of databases, the actual production databases should all run in this mode,

The archive mode should be combined with the corresponding backup policy. Only when the archive mode does not have the corresponding backup policy will cause trouble.

1. shutdown normal or shutdown immediate

 
 

  
  
[oracle@jumper oracle]$ sqlplus "/ as sysdba"  
  
  
SQL*Plus: Release 9.2.0.4.0 - Production on Sat Oct 15 15:48:36 2005  
  
  
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.  
  
  
Connected to:  
  
  
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production  
  
  
With the Partitioning option  
  
  
JServer Release 9.2.0.4.0 - Production  
  
  
SQL> shutdown immediate;  
  
  
Database closed.  
  
  
Database dismounted.  
  
  
ORACLE instance shut down.  
 
 

2. Start the Oracle database to the mount status

 
 

  
  
SQL> startup mount;  
  
  
ORACLE instance started.  
  
  
Total System Global Area 101782828 bytes  
  
  
Fixed Size 451884 bytes  
  
  
Variable Size 37748736 bytes  
  
  
Database Buffers 62914560 bytes  
  
  
Redo Buffers 667648 bytes  
  
  
Database mounted.  
 
 

3. Enable or stop archive Mode

To enable the archive mode, use

 
 

  
  
Alter database archivelog command.
  
  
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 148
  
  
Next log sequence to archive 151
  
  
Current log sequence 151
 
 

The above content describes how to enable or disable the archive mode of the Oracle database, hoping to help you in this regard.