Backing Up Logical-Log Files

The logical logs contain a history of the transactions that have been performed. The process of copying a logical-log file to media is referred to as backing up a logical-log file. Backing up logical-log files achieves the following two objectives:

• It stores the logical-log records on media so that they can be rolled forward if a data restore is needed.
• It makes logical-log-file space available for new logical-log records.

  If you neglect to back up the log files, you can run out of log space.

You can initiate a manual logical-log backup or set up continuous logical-log backups. After you restore the storage spaces, you must restore the logical logs to bring the data to a consistent state. For more information on log backups, see the IBM Informix Backup and Restore Guide.