April Meetup: Google, a Colossus threw a Spanner in my GFS!

Google Colossus (https://cloud.google.com/files/storage_architecture_and_challenges.pdf) and GFS (https://static.googleusercontent.com/media/research.google.com/en//archive/gfs-sosp2003.pdf - maybe in reverse order).
And Spanner (https://static.googleusercontent.com/media/research.google.com/en//archive/spanner-osdi2012.pdf) if we are too quick, or the hosts host too well.