With permanent backup of the offline redo log files using BRARCHIVE ( brarchive -f|-fill ) you prevent a possible overflow of the archiving directory. You can also collect a certain number of offline redo log files before BRARCHIVE backs them all up together on tape ( brarchive -f <number> ).

When you use an external backup program via the Backint interface (see Using External Backup Programs), you must use the option to group offline redo log files. In this case every archiving action entails the activation of the interface and often the repositioning of the tape. This usually leads to the creation of a new ‘Save Set’. A reduction in the number of Save Sets by grouping the offline redo log files is beneficial for backup time.

See: -f|-fill.