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I used to build Ruby on Rails apps with MySQL.
MongoDB currently become more and more famous and I am now starting to give it a try.
The problem is, I don’t know the underlying theory of how MongoDB is working (am using mongoid gem if it matter)
So I would like to have a comparison on the performance between using MySQL+ActiveRecord and model generated by mongoid gem, could anyone help me to figure it out?
The article entitled: What the heck are you actually using NoSQL for? does a very good job at presenting the pros and cons of using NoSQL.
Edit: Also read http://blog.fatalmind.com/2011/05/13/choosing-nosql-for-the-right-reason/ blog post too
Re-edit: I found some recent material (published in 2014) on this topic that I consider to be relevant: What’s left of NoSQL?