Good rsync-with-version-history solution for mission-critical remote backups on Windows?

I need to back up some huge files (100GB) and a zillion little ones (2,000,000 x 50k) over the internet via SSL, from one Windows Server 2008 box to another.

What I want is to have the directory structure on the backup server mirror the production server -- but with a version history. rsync does the first part, and I know a few products combine rsync with a version history, but I don't know which ones are really ready for prime-time.

My plan was to use Syncrify, but since nobody seems to have any experience with it, I'm looking for other ideas.

From serverfault Jesse

• If you want to backup with a version history as in being able to restore older versions of backed up files, you should probably look at using a versioning system such as git or subversion instead of a copy system like rsync. Less recommended alternatives would be to manage your own deltas with something like incremental tar files.

  If I misunderstood what you want for "version history", please clarify your question, but rsync itself is not a tool equipped to keep a history of either it's own actions over time or versions of files as they change through time. It is just a copy/synchronization tool. A very good one at that, but a very specific use tool.

  Edit: Another tool that might suit your needs is rsnapshot, which uses rsync as a copy tool but keeps track of multiple versions so that you can backtrack to older "snapshots".

  Jesse : Caleb, thanks for the version-control suggestion. AFAIK, git and svn don't have the bandwidth-saving delta storage that rsync does. rsnapshot would be perfect... if it ran on Windows.
  From Caleb

• Syncrify is good and should work. We use it to backup our web server and it works fine. However, I have not te

  Jesse : Danny, can you tell me more about what you're backing up?
  From Danny