[development] flickr - how to scale a php app

with all the enterprise talk floating about, i want to share this persentation from the flickr guys which circulated for a while but i bet some folks haven't seen it. there is some good info on their scaling problems and solutions. no deep details, but still useful. their usage stats are impressive, and i'm sure they have grown tremendously since this presentation. see http://www.niallkennedy.com/blog/uploads/flickr_php.pdf