User blog comment:LOTRMod/Joetater: A Region Saver/@comment-26061849-20160827205319/@comment-25550759-20160827220132

I believe it is server-side (so server and client), as it is used to backup server files. It probably wouldn't be used in the server unless it's needed for a reset though. Of course, I could be wrong; that's just my best guess.