I have a co-located server, and a desktop computer. I push small things and large ammounts of small files (like my iTunes) into a JungleDisk cloud. If a few files change there, no big deal, the file gets re-uped. For larger files JungleDisk backup isn't helpful. Things like movies and VMware images that change a lot, but I want backed up. Just not to JungleDisk since that would cost me even more money.

I am looking for a product, closed or open source (preferably open source) that will sync the change, or delta, to my personal server on a schedule. That way I can keep a copy of my larger things, without paying JungleDisk a ton more since they are in the range of many Gigabytes.

  • Right now these few items are backed up over FTP, and take forever.
  • Both the client and server are windows environments.

Update: Please don't suggest more cloud backup services, I need a piece of software I can run on my personal computer and server. I just want the changed bits synced after the initial backup. So I think I am looking for something like rsync for Windows, without install Cygwin.


try crashplan.

  • This looks like a service, I want to sync only between my desktop and personal server over the internet. I already use JungleDisk for cloud backup for smaller files. – Urda Mar 24 '10 at 12:51
  • look again. b4.crashplan.com/consumer/features-specs.html describes the free computer to computer backups. – yanokwa Mar 24 '10 at 13:33
  • Yeah, Crashplan offers a paid service on top of the free client, that seems to do what you want. The free client can go between your own machines. – Dean J Mar 24 '10 at 14:04
  • Ah I apologize, I'll look at it again. – Urda Mar 25 '10 at 4:31
  • A little bulky, but the app works pretty well and is actually really easy to setup as remote backup locations! I love it :) – Urda Mar 31 '10 at 23:47

Rsync via Cygwin is absolutely magical, if you're comfortable with the command line. Only the differences are transferred over the network, so it's very fast when transferring large files with tiny changes.

  • 2
    I have never liked Cygwin... – Urda Mar 24 '10 at 12:49
  • there's a repackaged cygwin-based rsync here: itefix.no/i2/node/10650 ... doesn't require installing the full cygwin environment, just a standard Nullsoft installer. there may be other windows ports of rsync in projects like GnuWin32 or separately. – quack quixote Mar 25 '10 at 9:09

I've had some success with AllwaySync. It's a fairly sophisticated file and folder syncronization app for Windows, and apparently free for personal use. It will also enable you to set up a schedule for backups, and it supports a number of protocols and services.

Update: Wrong answer - AllwaySync doesn't support delta copying.

Have a look at DeltaCopy instead. It's described as a Windows friendly wrapper around rsync, and doesn't require cygwin to be installed. Performs incremental backups, has a scheduler, and is open source - distributed under GNU GPL v3.

  • Does it sync only the delta? – Urda Mar 24 '10 at 12:50
  • ...and will it work over the internet without a VPN connection? – Urda Mar 24 '10 at 12:58
  • AllwaySync doesn't appear to support delta copying - apologies. Posted an alternative suggestion. – AffineMesh Mar 24 '10 at 14:58
  • deltacopy includes a packaged version of cygwin too – JamesRyan Feb 29 '12 at 13:09

So I think if you asked Microsoft, they would tell you that the "rsync for Windows" tool you're looking for would bye SyncToy.

Not open source and no built in scheduler-- but there are instructions for how to set up with the task scheduler.


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