http://github.com/flipsasser/Persistence-Smoothie

NoSQL means no ACID
Keep what you know – don’t throw out your MySQL

DataMapper is the swiss army knife of ORM
- can point different models to different datastores
- Have a lot of refactoring to do

Sample Store App
- Authentication – keep in Reational DB
- Products – store metadata
- Purchases – keep it in RDB
- Activity Stream – denormalize with key/value store

mongofy – gem for moving data from mysql to mongo

Drawbacks
- DataPortability is lowered
- Lot more moving parts
- Say goodbye to all your fun AR mixins