'How would YouTube store data of who liked which videos?
If Youtube uses MongoDB as their database, then how would they store the who liked which videos information?
Option 1:
Store it in the Videos collection with a field that holds a list of subdocuments containing the user id and weather they liked it or disliked it.
Option 2:
Store it in the Users collection with a field that holds a list of subdocuments containing the video id and weather they liked it or disliked it.
Option 3:
Store this many-to-many relation in its own collection.
Questions.
- Would the document size in Options 1 be at risk of exceeding the 16 MB limit?
- Would the document size in Options 2 be at risk of exceeding the 16 MB limit?
Sources
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Source: Stack Overflow
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