Unison In Anger

I use the Keepass family of software for my password management and on my iPhone I can use the wonderful KeePassium which supports syncing the password database over WebDAV for self-hosting your "cloud" sync infrastructure, but KeePassXC on Linux/FreeBSD offers nothing of the sort. If you want to sync your password databases, you have to figure it out yourself. Typically at this point someone will suggest a DropBox-style file sync software like Syncthing. That would work, but let's be honest: we're talking about running a pretty heavy service, which even though it's written in Go, is still consuming ~400MB of RAM on one of my servers. We're currently living through a severe memory shortage. I've seen people suggest git, but that's also heavy. My primary password database is almost 2MB and KeePass rewrites the whole file with every change, so that git repo will grow a lot over time. Rsync? But doing it two-way is going to be tricky... There must be something better, right? I was…