Design a Video-on-Demand (VOD) Streaming Service
Design a large-scale video-on-demand (VOD) streaming service, similar to a major streaming platform. The service should support millions of daily active users globally across multiple regions.
User Capabilities:
- Sign in and browse a catalog of movies and shows.
- Select a title and begin playback on web, mobile, or TV applications.
- Pause, resume, and seek within videos.
- Continue watching across different devices seamlessly.
- Experience smooth streaming under varying network conditions.
Content Provider Capabilities:
- Upload video assets.
- Process videos into multiple quality formats (transcoding).
- Publish titles to the service's catalog.
Assumptions:
- The service operates globally with users in multiple regions.
- The service will have millions of daily active users.
- Video titles are typically hours long.
- Streaming utilizes segmented adaptive bitrate (ABR) technology.
Discussion Points:
- Functional and non-functional requirements.
- High-level APIs and interfaces.
- Core services and overall architecture.
- Storage solutions and data modeling.
- Content Delivery Network (CDN) strategy, caching, and ABR streaming.
- Video transcoding pipeline.
- Scalability, reliability, and observability.
- Key trade-offs (e.g., latency vs. cost vs. consistency).
AI interview prep
Core dilemma
Balancing the delivery of high-quality, low-latency video streams to millions of concurrent users globally against the significant costs of storage, transcoding, and global CDN infrastructure.
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 Video-on-Demand (VOD) Streaming Service
Design a large-scale video-on-demand (VOD) streaming service, similar to a major streaming platform. The service should support millions of daily active users globally across multiple regions.
User Capabilities:
- Sign in and browse a catalog of movies and shows.
- Select a title and begin playback on web, mobile, or TV applications.
- Pause, resume, and seek within videos.
- Continue watching across different devices seamlessly.
- Experience smooth streaming under varying network conditions.
Content Provider Capabilities:
- Upload video assets.
- Process videos into multiple quality formats (transcoding).
- Publish titles to the service's catalog.
Assumptions:
- The service operates globally with users in multiple regions.
- The service will have millions of daily active users.
- Video titles are typically hours long.
- Streaming utilizes segmented adaptive bitrate (ABR) technology.
Discussion Points:
- Functional and non-functional requirements.
- High-level APIs and interfaces.
- Core services and overall architecture.
- Storage solutions and data modeling.
- Content Delivery Network (CDN) strategy, caching, and ABR streaming.
- Video transcoding pipeline.
- Scalability, reliability, and observability.
- Key trade-offs (e.g., latency vs. cost vs. consistency).