A little video, thin on detail of course, but hints at some home truths on building/designing scale-able applications (and i’d go so far to say that they are applicable to ALL applications not just webapps)

http://joyent.vo.llnwd.net/o25/videos/LinkedIn-Bumpersticker-LED-Scaling-Rails.m4v

Of course, I know Ben Rockwood like’s his solaris and F5′s – but that’s not going to surprise many (and I just LOVE f5s)

And here’s a blog entry with the details on /how/ that’s done:-

http://www.joyeur.com/2008/04/18/the-wonders-of-fbref-and-irules-serving-pages-from-facebooks-cache

. . . basically as simple as:-

when HTTP_REQUEST {
  if { [HTTP::uri] contains "/popular_something/list"} {
    HTTP::respond 200 content "<fb:ref handle='[HTTP::uri]'/>"
  } else {
    pool facebook.application_server_pool
  }
}