How does one enable or disable the ARCHIVELOG mode of oracle ?, Oraclearchivelog

How does one enable or disable the ARCHIVELOG mode of oracle ?, Oraclearchivelog

1. Connect to the database as an administrator

C:\Users\Administrator>sqlplus sys/sys@prjdb as sysdbaSQL*Plus: Release 11.2.0.1.0 Production on Tue Jun 17 23:50:55 2014Copyright (c) 1982, 2010, Oracle.  All rights reserved.Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing options

2. Check whether the current archive mode is archive or non-archive.

SQL> archive log list;Database log mode              No Archive ModeAutomatic archival             DisabledArchive destination            USE_DB_RECOVERY_FILE_DESTOldest online log sequence     228Current log sequence           230

3. Shut down the database

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

4. Start the database to the mount status.

SQL> startup mount;ORACLE instance started.Total System Global Area 3423965184 bytesFixed Size                  2180544 bytesVariable Size            2013268544 bytesDatabase Buffers         1392508928 bytesRedo Buffers               16007168 bytesDatabase mounted.

5. Start the archive Mode

SQL> alter database archivelog; Note: if an error is reported here, you need to turn off the flashback log. SQL> select flashback_on from v $ database; SQL> alter database flashback off; Database altered. SQL> archive log list; Database log mode Archive ModeAutomatic archival EnabledArchive destination USE_DB_RECOVERY_FILE_DESTOldest online log sequence 228 Next log sequence to archive 230 Current log sequence 230

6. Start the database

SQL> alter database open;Database altered.

7. Disable archive Mode

SQL> shutdown immediate;Database closed.Database dismounted.ORACLE instance shut down.SQL> startup mount;ORACLE instance started.Total System Global Area 3423965184 bytesFixed Size                  2180544 bytesVariable Size            2013268544 bytesDatabase Buffers         1392508928 bytesRedo Buffers               16007168 bytesDatabase mounted.SQL> alter database noarchivelog;Database altered.SQL> archive log list;Database log mode              No Archive ModeAutomatic archival             DisabledArchive destination            USE_DB_RECOVERY_FILE_DESTOldest online log sequence     228Current log sequence           230SQL>