title: MongoDB Read/Write Locks
body: <p>I'm planning to create an application using nodejs that users can rate the products. From what I heard locks are different in mongodb than mySql. </p>
  
  <p>I'm worried that if let's say 10 users vote on a product at a same time, Mongodb can't handle it and the result other users see is not correct.</p>
  
  <p>I looked at similar questions but I'm still confused! Is mongodb a good choice or should I just use Mysql? I'd appreciate your help</p>