"Simple" sharding tutorials using MySQL or PostgreSQL?
rit: I don't know about Rails (It's DB library is ActiveRecord, if I recall names correctly) but SQLAlchemy which is Python's big ORM, has support in it for sharding and similar partitioning, etc.When we built sketchcast.com sharding was on the design list and a concern - there were some fantastic articles at http://highscalability.com/ that we used as a basis for some of our design.