@ZogG version tool using sailfish internal upgrade mechanism based on store-client and ssu, it's not just upgrading packages like zypper does. zypper itself (as command-line utility) doesn't respect sailfish upgrade mechanism. if you want to use zypper or any other utility for upgrading sailfishos version - please do it at your home and don't public it in general threads in forum. It's dangerous for newible users. zypper (command-line tool) storing big logs, not libzypp backend itself. and there are no logrotate available for sailfishos/nemomobile, feel free to compile it yourself. Sailfish using journal to store logs, zypper (command-line tool) not using journal to store logs.