Grokking the System Design Interview, Volume II
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Design Reddit: System Definition

Step 1: System Definition

Open Reddit and look at the front page. Every post there shows a title, a score, and the community it came from. In this case study, we design the backend behind that page.

We are building a social platform like Reddit. Users share content and discuss it in community forums. A user creates a post, and a post can be text, an image, a link, or a video.

Posts are organized into topic-based communities called subreddits. Other users then vote on the post, up or down, and add comments to discuss it.

Reddit itself is the real-world example

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shivani agrawal

shivani agrawal

· 4 months ago

one important aspect that i found missing from all the posts is for observability and how can we tackle it

P B

P B

· 8 months ago

With so many features in this design, it makes it extremely difficult to follow and correlate across the seven sections. A much better representation would be tackling part of the features independently as separate design and a section tying them up together. For example, Messaging and Notification can be their own design problem and could be referred from this design.

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