This is SUPER helpful! Just the other day I was wondering how someone like me could get involved in the hard scalability problems I read so much about here on the hackers news. But how to make my boring old highly cachable read-only web traffic into a major scalability problem? Then I read this blog entry, and wow, now each log entry on my site turns into a random btree update in MongoDB made while holding a global write lock. Thanks again hackers news, and thanks again BIG DATA!