title: Collection or documents for multiple projects?
body: <p>I want to manage multiple projects data in mongoDB. Each project contains multiple users from multiple departments with multiple role assigned to them. plus certain task is assigned to each user. Now I am confused about schema, not able to decide which entity should be kept as collection &amp; which one as document ?  What is the best efficient way to store ?
  should I keep all under single collection as embedded documents or in separate collection ?
  Thanks</p>