Database Design for Facebook System Design
For designing a Facebook-like application, you can follow a database design that incorporates both relational and NoSQL databases, along with caching mechanisms.
- User Profiles: Store user information such as name, email, password hash, date of birth, etc.
- Friendships: Store relationships between users. This could be a table with columns like “user_id”, “friend_id”, and “status” to represent friend requests, accepted friendships, etc.
- Notifications: Store notifications for users such as friend requests, likes, comments, etc. This table could have columns like “user_id”, “notification_type”, “created_at”, etc.
- Posts: Store user posts along with associated metadata like timestamps, location, privacy settings, etc. This can be stored in a NoSQL database like MongoDB or Cassandra.
- Comments: Store comments on posts with information about the commenter, timestamp, etc.
- Reactions: Store reactions (likes, loves, etc.) on posts.
3. Caching:
- Use Redis or similar caching mechanisms to store frequently accessed data such as user sessions, frequently accessed user profiles, recent posts, etc. This helps reduce the load on the main databases and improves performance.
Design Facebook | System Design
Designing a system as complex and globally impactful as Facebook requires careful consideration of various factors, including scalability, reliability, and performance. This article explores the key components and architectural decisions involved in designing Facebook, focusing on its core functionalities and the challenges of supporting billions of users worldwide.
Important Topics for Facebook System Design
- Requirements Gathering for Facebook System Design
- Capacity Estimation for Facebook System Design
- HLD (High-Level Design) for Facebook System Design
- LLD (Low-Level Design) for Facebook System Design
- Database Design for Facebook System Design
- Scalability for Facebook System Design
- APIs Used for Facebook System Design
- Components Details in Facebook System Design