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Design a TikTok-like short video platform
Content Delivery Networks and Edge CachingVideo Transcoding and Adaptive Bitrate StrDistributed Message Queues and Event-DriveRecommendation SystemsDistributed Data Stores
Problem Description
Design a short-video product similar to TikTok.
Core User Stories
- Users can upload short videos, typically ranging from 10 to 60 seconds in length.
- Users can watch an infinite "For You" feed, which provides personalized video recommendations.
- Users can engage with content and creators by liking videos, posting comments, following creators, and sharing videos.
Functional Requirements
- Video Management: Support video upload, processing (including transcoding), storage, and playback.
- Feed Generation: Generate a personalized, ranked list of videos for each user's "For You" feed.
- Engagement: Implement features for users to like videos, comment on them, and follow creators.
Non-Functional Requirements
- Performance: Achieve low startup latency for video playback and ensure smooth scrolling within the feed.
- Scalability & Availability: The system must be highly available and horizontally scalable to handle a large and growing user base and content volume.
- Consistency: Define and apply appropriate consistency models (strong vs. eventual) for different parts of the system.
- Operational Aspects: Incorporate observability features and mechanisms for abuse mitigation (e.g., detecting spam, reuploads, and bot-generated likes).
Deliverables
The candidate should present:
- A high-level architecture outlining key services.
- Choices for data models and storage solutions.
- The design of the feed generation and recommendation pipeline, covering both online and offline components.
- A comprehensive caching and Content Delivery Network (CDN) strategy.
- Strategies for handling hot videos/creators and managing traffic spikes.
- A sketch of key APIs and metrics to monitor.
AI interview prep
Core dilemma
Balancing the extreme demands of high-volume, low-latency video content delivery with the complexity of real-time personalized feed generation and robust content processing at scale.
Mid-level signals3
Senior signals4
Red flags4
3 tradeoffs and 3 stress tests locked
Interview prep
Unlock the interviewer X-Ray rubric, tradeoff matrix, stress tests, clarifying questions, and key concepts.
Design a TikTok-like short video platform
Content Delivery Networks and Edge CachingVideo Transcoding and Adaptive Bitrate StrDistributed Message Queues and Event-DriveRecommendation SystemsDistributed Data Stores
Problem Description
Design a short-video product similar to TikTok.
Core User Stories
- Users can upload short videos, typically ranging from 10 to 60 seconds in length.
- Users can watch an infinite "For You" feed, which provides personalized video recommendations.
- Users can engage with content and creators by liking videos, posting comments, following creators, and sharing videos.
Functional Requirements
- Video Management: Support video upload, processing (including transcoding), storage, and playback.
- Feed Generation: Generate a personalized, ranked list of videos for each user's "For You" feed.
- Engagement: Implement features for users to like videos, comment on them, and follow creators.
Non-Functional Requirements
- Performance: Achieve low startup latency for video playback and ensure smooth scrolling within the feed.
- Scalability & Availability: The system must be highly available and horizontally scalable to handle a large and growing user base and content volume.
- Consistency: Define and apply appropriate consistency models (strong vs. eventual) for different parts of the system.
- Operational Aspects: Incorporate observability features and mechanisms for abuse mitigation (e.g., detecting spam, reuploads, and bot-generated likes).
Deliverables
The candidate should present:
- A high-level architecture outlining key services.
- Choices for data models and storage solutions.
- The design of the feed generation and recommendation pipeline, covering both online and offline components.
- A comprehensive caching and Content Delivery Network (CDN) strategy.
- Strategies for handling hot videos/creators and managing traffic spikes.
- A sketch of key APIs and metrics to monitor.