If either logretain or userexit are enabled, the active log files will be retained and become online archive log files for use in roll-forward recovery. This is called log retention logging.
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.
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