Many to many relationships with MongoDB at large scale

Question

I\'ve seen many posts on how to do many-to-many relationships with MongoDB, but none of them mention scale. For example these posts:

MongoDB Many-to-Many Association

Answer 1

If you're just storing the ID's of the relationships inside the arrays of reach collection you shouldn't have much of a problem within a single document. GridFS can be used but that's usually more for media like files, music, videos, etc. using GridFS would make doing updates a pain