I'm doing a simple forum mongodb DB, with categories,topics,posts and users.
My question is :
How should i do the references between categories,topics and posts to be as faster and lighter as posible, with the _id or nesting objects like this?
categories{category:'categoryname',
           topics:{topic:'topic',
                   posts:{post:'post',
                          user:'_idfromusers'
                         }
                   }               
          }
Suppose category has a very very big number of topics, and topics has a very very big number of posts.
