In case you didn’t read the Google Megastore paper
, James Hamilton has published his notes on the paper:
Overall, an excellent paper with lots of detail on a nicely executed storage system. Supporting consistent read and full ACID update semantics is impressive although the limitation of not being able to update an entity group at more than a “few per second” is limiting.
Original title and link: Google Megastore Paper Summarized (NoSQL databases © myNoSQL)