Well my platform is n number of $20 linodes to start. I'm clustering the python application across them using uwsgi+nginx (all I have to do is add an IP address in the config to scale), it's going to be a given that I shard the database across them as well. If you feel I should avoid Mongo would you recommend Cassandra instead?
Regardless, I think my initial question regarding when to denormalize data applies to any database including scaled MySQL, but perhaps was a better question for stackoverflow.
Regardless, I think my initial question regarding when to denormalize data applies to any database including scaled MySQL, but perhaps was a better question for stackoverflow.