MongoDB: Sharding on single machine. Does it make sense?

Question

created a collection in MongoDB consisting of 11446615 documents.

Each document has the following form:

{ 
 \"_id\" : ObjectId(\"4e03dec7c3c365f57482         


        

Answer 1

This is answered in the first paragraph of the Replica set tutorial

http://www.mongodb.org/display/DOCS/Replica+Set+Tutorial