Constantly sync files?

[vbuggy]

I'm looking for an app that works in the background constantly maintaining a folder in sync between two computers. While there are many which will do that, I need one that works reliably across a VPN which may have variable latency and is transparent / 'hands-off' to the user once set up.

Oh, one which works to S3 would also be nice.

Any suggestions?
Many thanks.

 

[yinan]

Distributed File System can do this, but you need a server. It uses BITS and takes bandwidth into account.

 

[Saga]

Out of curiosity, why not just share a partition/secondary hdd via network between the two machines? Considering that would be directly modifying the files in question everytime they were used between as many networked PC's as you want, wouldn't that simply work just as well?

 

[vbuggy]

The problem is that the link has finite bandwidth, and pulling the files down when it's needed as well as all the data that is coming down the line too would be too slow.