JungleDisk won't do it directly with rsync, but their software does provide the same basic functionality of backing up only changed portions of files. If you've looked at it in the past this used to be called JungleDisk Plus and was an added-cost service beyond the base software license; they now just charge a slightly higher cost per month with no upfront cost. They have a $2/month plan that's backup-only and targeted at basic users (Grandma) and a $3/month plan that includes network mapped drives and other features.
Since you're probably in Europe based on your pricing, it's worth noting that JungleDisk offers 3 options for file storage (all include the first 5GB "free") - Amazon S3 in the US for $0.15/GB/month, Amazon S3 Europe for $0.18/GB/month and Rackspace US for $0.15/GB/Month. Both Amazon options charge for bandwidth, Rackspace does not. If you're very price sensitive, Rackspace US would be the way to go, otherwise Amazon Europe may be faster for you.
With Rackspace storage, you'd be paying around $9.75/month total; with Amazon EU you'd be paying $12-13/month depending on how much data you were moving each week and your initial upload would cost around $5. Subtract around $1.50 for Amazon US.
JungleDisk also runs on Windows/Linux/Mac.
+1 - Just a comment though on cross-backupping servers. Even better: a story on why that could be a bad idea: http://en.wikipedia.org/wiki/Avsim#Hacking_case
– mac – 2009-11-30T14:33:56.247There is a way to mitigate that. My main servers all have different passwords/keys and do not have access to log into each other directly so you can't hack one from the others. They each push the backup data by rsync to an intermediate VPS then pull down the stuff, again by rsync, that they are storing for the other machines. The intermediate machine has no passwords/keys for the other servers so it isn't a central hacking opportunity either. If a machine is compromised and sends a bad backup before I notice the problem, yesterday's backup will still be fine as will last week's and so on. – David Spillett – 2009-11-30T14:42:33.737
Thanks, however the problem with all of these is price. I currently pay $10/month for plenty of bandwidth and space (so far as they don't close my acct.). rsync.net and the VPS solutions I looked at are well over that for the bare minimum of storage I need. bqbackup is a bit more reasonable.
Still the Amazon/Rackspace cloud related stuff seems a lot cheaper, has anyone had good experiences with that and Linux+rsync? – happyskeptic – 2009-11-30T15:30:25.483
DreamHost (and most other providers like them) can be that cheap because all their resource (space, bandwidth, CPU power, ...) is massively oversold in order to be competitive in the hope that all but a few of their users will use no more than a fraction of what they could. Good backup and VPS providers can't oversell (or at least not nearly that much) so will never be competitive in those terms. You are simply not comparing like-for-like there. Personally my gut feeling is that I'm not sure I would want my backups on "the cloud", but others may have more to say for/against that. – David Spillett – 2009-11-30T17:02:34.627