A couple of weeks ago, I decided to spend a few hours on a Friday afternoon improving my backup process for my Blackfly managed hosting service . Two weeks later, I've published my ongoing work as an update to my backup-rsync project and have decided to share it with you. You might think I'm trying to compete for "least click-bait like title ever", but I'm going to claim this topic and project might be of interest to anyone who likes to think about refactoring , or who is implementing backups for container-based hosting (like mine ). Definition "Backup" is one of those overloaded words in both vernacular and computer-specific use, so I want to start with definitions. Since "a backup" is amongst the least interesting objects (unless it contains what you absolutely need in that moment), I think it's more interesting and useful to define backups functionally, i.e. A "backup process" is a process that 1. provides a degree of insuranc