title: How to create huge random document in MongoDB
body: <p>I am newbie with MongoDB. I'm trying to create a database which will be included 10,000 data. The data will contain "username" and "Birthday".</p>
  
  <p>I want to create 10,000 data with random username and birthday. Do we have a fastest way to create this kind of database?.</p>
  
  <p>Thank you so much for your help!</p>