Backup client for Windows: open source, rsync and VSS

Question

I'm looking for a sync/backup client for Windows with:

1. Open source license (BSD/GPL)
2. rsync deltas to a remote rsync server
3. VSS support

Command line interface is preferred to a GUI.

The less of everything else, the better.

Any ideas?

Solution

I believe that Duplicati meets all of your specifications http://code.google.com/p/duplicati/ - it supports VSS, uses deltas and has a commandline client in addition to the GUI.

Comments

[N.N.]

Tried Unison?

[Eroen]

Is "VSS" Visual SourceSafe or Shadow Copy?

[Armel Larcier]

Hey! How about it now? Could it help me with this : superuser.com/q/931489/183293

[David Goedecke]

Duplicati is great for this as long as you don't need to run the backup as a service. This is promised for version 2.

[David Goedecke]

Problem with BackupPC is that using SMB to get the files does not allow snapshotting (VSS) of the filesystem and therefore does not allow backup of open files.

[Aaron C. de Bruyn]

Duplicati doesn't use rsync. It uses rdiff. groups.google.com/forum/#!topic/duplicati/abqyUO3w9qU

[Armel Larcier]

Is this an option for what I need : superuser.com/q/931489/183293