I am in the process of setting up a log shipping scenario with two SQL Servers linked via VPN (Barracuda NG Firewall, for what it's worth). The VPN is using UDP and packet compression, so I don't have the "TCP over TCP" issue. Of course, I need the actual files to get copied across, and I'd like the SQL settings to refer to a drive letter (like L:).
SMB has failed terribly at this, as I expected.
What protocol would do best over a high-latency, high-bandwidth link that would allow me to map the share as a "drive?"