you should use a differential binary updater. SUSE introduced differential rpm updates quite a while back and others have it too these days. the really tricky

you should use a differential binary updater. SUSE introduced differential rpm updates quite a while back and others have it too these days. the really tricky part is making the update robust against power outage or, much more probable, manual power off "ThE UpDaTe TaKeS So LonG"