Re: realise diff-updates with dpkg
> > Anyway, rsync sounds like the most appropriate mechanism to
> > transfer these particular databases.
> My blacklists should be available for everyone not only for those who
> can connect with my server via ssh...
rsync doesn't require ssh; for your scenario you probably just want
'rsync --daemon' from inetd. And yes, this is very much a job for
rsync. Or go with zsync, if you want to use http as a transport.
Don't try to emulate rsync with dpkg, it will not go well. dpkg
doesn't add anything you can't get with a little scripting (and
producing your incremental debs definitely requires some scripting
(If reloading a full dataset into your database is _that_ expensive,
what you want to do is 'ln'-backup the old file, rsync the new, 'diff'
them, and use the diff output to generate a database import script.)