Design Facebook’s newsfeed system.

1.	Design Facebook’s newsfeed system.
Answer» Facebook’s newsfeed allows users to see what is happening in their friend's circle, liked pages and groups followed. What are some of the Required Features? Generate newsfeed USING posts from other system ENTITIES that the user follows. Newsfeed posts can be of text, image, audio or video format. Append new posts to the user’s newsfeed in close to real-time. What are some of the Common Problems encountered? What happens if the new post sees a LOT of latency to get appended to the news feed? Can the algorithm handle sudden user load? What posts should take priority for displaying in the news feed? Possible tips for consideration: EVALUATE the PROCESS of fanout for publishing posts to the followers Check how sharding can be achieved efficiently for handling heavy user load. The feed data of a user shouldn't be put into multiple servers. Instead, sharding can be done on user ids.

Answer»

Facebook’s newsfeed allows users to see what is happening in their friend's circle, liked pages and groups followed.

What are some of the Required Features?
- Generate newsfeed USING posts from other system ENTITIES that the user follows.
- Newsfeed posts can be of text, image, audio or video format.
- Append new posts to the user’s newsfeed in close to real-time.
What are some of the Common Problems encountered?
- What happens if the new post sees a LOT of latency to get appended to the news feed?
- Can the algorithm handle sudden user load?
- What posts should take priority for displaying in the news feed?
Possible tips for consideration:
- EVALUATE the PROCESS of fanout for publishing posts to the followers
- Check how sharding can be achieved efficiently for handling heavy user load. The feed data of a user shouldn't be put into multiple servers. Instead, sharding can be done on user ids.

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