We're trying to find a system to keep a pair of servers in sync, and I've looked at a million solutions. I came across incron, which seems like it would be perfect. Now, I just need a low overhead way of copying the files that have changed to the other server. It's a local network, so encryption isn't necessary, and it's a gigabit connection, so compression is out as well.
Rsync might work, but it seems a little hefty for this task. nc seems like it would be great, but I don't know of a way to signify to the other server where the file should go from the first server.