Kai Schaetzl wrote: >> The second thing you will notice, eventually, is that rsync over ssh >> under Cygwin is unreliable. > > You mean *starting* an rsync operation on that side? Using rsync over ssh > essentially uses rsync on *both* ends. So, it's running under Cygwin, anyway, > which makes your statement a bit confusing. What I mean is that if you launch rsync with something like: rsync -e ssh server:/path /path then rsync uses a non-blocking (I said blocking earlier, which was a mistake) socket pair to communicate with ssh. This may trigger a bug in cygwin which can cause the application to hang. If, instead, you run rsync as a daemon on Windows, you can reliably communicate with the daemon over TCP. This remains true if you use ssh to forward a port. Thus, I recommend that anyone running rsync on Windows set up rsync as a daemon that listens for connections on localhost only and use ssh port forwards to reach it from remote systems.