Take this as a positive criticism, I dont want to put you down, but today everyone is considering backup as problem of moving data. Which is wrong. This is far from what I would expect from backup tool. You have many targets but than this is just a data moving tool to the cloud. On the other side rarely any serious organisation moves the data to the cloud and even if they do, it is considered as second tier storage. Primary target is always to the streamer (tape), it is THE only storage that was time proven. Also, there are some concepts; incremential, differential, delta, rehydrating, archiving, lets not even go into deduplication... and there are open source solutions for that. Backup word is not a simple tag, do your homework and study the backup field, it is highly complex and far from moving the data from point A to point B, maybe just a thought to show you the importance, some organisations have separate backbone for backups and disk arrays to minimise downtime, the data are not always on disk, the minimum you need is flushing the disk cache, for the database you will hit into words like freeze, for virtual machines... well.. good luck :)

But anyway, nice to see you like it enough to write a tool, just keep on going :)

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After my initial post, I was dowvoted. To justify that: this is not a backup, it is just an alternative to rsync or cp with multiple targets and more of something I would run after a real backup has finished. If someone is looking for real backup, there are multiple open source backup products that know their domain. This one clearly does not.