Some good comments here, too: <a href="http://www.reddit.com/r/programming/comments/bml4i/support_large_repositories/" rel="nofollow">http://www.reddit.com/r/programming/comments/bml4i/support_l...</a> , including:<p><i>There's a reason companies pay hundreds (or is it thousands) of dollars a seat for Perforce.<p>Semiconductor industry similar to games. A big chip like a GPU or large CPU can have millions of files, with multiple branches for development and different models.</i>