Design Typeahead Suggestion/Autocomplete — System Design Interview Practice
Design an autocomplete system that provides real-time search suggestions as users type. Work through the requirements, architecture trade-offs, and an interactive design review.
Requirements and concepts to consider
- Provide suggestions as user typesRequirement
- Return top N most relevant suggestionsRequirement
- Support fuzzy matching and typo toleranceRequirement
- Personalized suggestions based on user historyRequirement
- Update suggestions in real-timeRequirement
- Handle billions of queries per dayRequirement
- Support multiple languagesRequirement
- searchConcept to explore
- autocompleteConcept to explore
- trieConcept to explore
- real timeConcept to explore
- cachingConcept to explore