Enable Oracle Archiving Mode

In Oracle database, archiving mode is an optional database mode that allows completed database transaction logs to be stored in archive logs for recovery, backup, and restoration when needed. To enable archiving mode in Oracle database, follow these steps:

Log in to the SQL*Plus or SQL development tool of the Oracle database using an administrator user with appropriate permissions.

Ensure that the database instance is running and either in archive mode or not yet enabled for archive mode.

3. Use the following command to enable archive mode:

   ALTER DATABASE ARCHIVELOG;

This command switches the database to archive mode.

4. Verify if the archive log destination path has been configured correctly by running the following command to check the current path.

   SHOW PARAMETER LOG_ARCHIVE_DEST;

If the destination path is not configured or needs to be changed, you can use the ALTER SYSTEM command to set the archive log destination path, for example:

   ALTER SYSTEM SET LOG_ARCHIVE_DEST = '/archivelog';

This command will archive the logs in the specified directory.

Ensure that the database instance has been started and that the archiving process (ARCH) has been initiated. This can be verified by using the following command:

   SELECT STATUS FROM V$INSTANCE;

If the status shows as “ARCHIVELOG,” it indicates that the archiving mode has been successfully enabled and the archiving process is running.

You can manually switch log files and generate archived logs using the following command:

   ALTER SYSTEM SWITCH LOGFILE;

After running this command, a new archive log file will be generated and the current log file will be archived.

Please note that enabling archiving mode may require additional storage space to store archive log files. Ensure that the database server has enough disk space to store these archive logs. Additionally, regular backup and cleaning of archive log files are necessary to prevent storage space from being filled up.