Interesting to see some technical details of FreeBSD's VFS layer, I've never delved too deeply into it myself but I have looked at Linux's so it's not completely unfamiliar to me.
This was very interesting, thanks. Sorta-OT, I wonder if there's a modern equivalent of Vahalia's Unix Internals: The New Frontiers [1]?
[1] http://www.goodreads.com/book/show/337378.UNIX_Internals
The article mentions illumos--has anybody got any experiences to share with using that instead of BSD or nix?
Happy to take any questions :-)