Design a Page View Counter · System Design Interview

Design a Page View CounterDesign the service that counts how many times each article on a news site has been read, and shows that count on the page.What it has to do

Record a view when an article is opened

Show the total views an article has

The number shown may lag a little behind

Scale

Articles: 2 million

Views per day: 500 million

Out of scope

Telling one visitor from another

Bot filtering

Analytics dashboards

The page itself

Practise this challengeAll system design challenges

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