Design Tag-Based Search · System Design Interview

Design Tag-Based SearchDesign the service that lets people tag items and then find every item carrying a given tag, or a combination of tags.What it has to do

Add and remove tags on an item

List the items that carry a tag

List the items that carry all of several tags

Scale

Items: 500 million

Tag changes per day: 20 million

Out of scope

Free-text search over item content

Tag suggestions

Tag moderation

The interface that shows the tags

Practise this challengeAll system design challenges

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