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You should look at something more along the lines of rdiff-backup (or whatever's fashionable these days) for that.

Using git would be pretty pointless, unless you're going to be frequently branching and merging against your mp3s or something.

Performance would be nightmarish. Git is super elegant and great, but not very performant. Imagine having to deltify a terabyte of data? Good luck with that!

wasn't it because he needed better performance one of the reasons Torvalds created git? http://en.wikipedia.org/wiki/Git_(software)

http://en.wikipedia.org/wiki/Bitkeeper#Pricing_change

Although git usually has faster performance than most other VCS, that doesn't mean it can easily handle terabyte disk image files. :P

See https://github.com/apenwarr/bup

bup! bup! bup!

https://github.com/apenwarr/bup