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Procedure documentation Performing Emergency Logical-Log Backup (ontape)  Locate the document in its SAP Library structure

Use

This procedure tells you how to perform an emergency logical-log backup on your Informix database using ontape . You must back up the logical log quickly if processing is to continue as soon as possible.

Procedure

The procedure you now follow depends on the backup approach you are using, automatic or continuous. For more information, see Choosing Automatic or Continuous Logical-Log Backup (ontape).

Continuous Logical-Log Backup

  1. Check whether you have mounted a new tape as required for continuous backup by entering the following command at the command line:
    2.

    $ ontape -c
  2. Mount a new tape on the LTAPEDEV device if prompted in the session window for continuous backup.
  3. Press <ENTER> to back up the currently full logical-log files.

The continuous logical-log backup resumes.

For more information about continuous logical-log backup, see Performing a Continuous Logical-Log Backup (ontape).

Automatic Logical-Log Backup

  1. To start the backup, enter the following command:
    2.

    $ ontape -a
  2. Mount a new tape on the LTAPEDEV device.

    3. The full logical-log files are now backed up.

  3. Mount new tapes if prompted.

When all full logical-log files have been backed up, the process stops.

For more information about automatic logical-log backup, see Performing an Automatic Logical-Log Backup (ontape).

Result

The logical log is now backed up and the database resumes processing.

SAP recommends you to find out why the emergency logical-log backup was necessary and to prevent it in future. Refer to:

 

See also:

Informix documentation