If this parameter is enabled, log retention logging is performed regardless of how the logretain parameter is set. This parameter also indicates that a user exit program should be used to archive and retrieve the log files. Log files are archived when the database manager closes the log file. They are retrieved when the ROLLFORWARD utility needs to use them to restore a database.
After logretain, or userexit, or both of these parameters are enabled, you must make a full backup of the database. This state is indicated by the backup_pending flag parameter.
If both of these parameters are de-selected, roll-forward recovery becomes unavailable for the database because logs will no longer be retained. In this case, the database manager deletes all log files in the logpath directory (including online archive log files), allocates new active log files, and reverts to circular logging.