Design a Video View Count System

Functional Requirements

1. Accurate Count Tracking

   • The system should accurately track the number of views for each video.
   • Ensure that repeated views by the same user within a short period are not counted multiple times.
   • Support real-time updates to reflect the current view count.

2. Scalability

   • Handle a large number of concurrent viewers and video uploads.
   • Support a growing number of videos and users over time.

3. Consistency

   • Ensure that view counts are consistent across different platforms and devices.
   • Provide eventual consistency for view count updates.

4. Analytics and Reporting

   • Provide APIs or interfaces for retrieving view count data.
   • Support aggregation of view data for analytics purposes.

5. Security

   • Prevent fraudulent activities such as view count manipulation.
   • Implement rate limiting and IP tracking to detect suspicious activities.

6. User Notifications

   • Notify video owners of significant milestones in view counts (e.g., 1000 views).

7. Localization

   • Support view count tracking across different geographical regions.

Non-Functional Requirements

1. Performance

   • The system should update and retrieve view counts with minimal latency.
   • Ensure low response times for API calls related to view counts.

2. Reliability

   • The system should be highly available, with minimal downtime.
   • Implement redundancy and failover mechanisms to ensure continuous operation.

3. Scalability

   • Design the system to handle peak loads efficiently.
   • Support horizontal scaling to accommodate increased traffic.

4. Data Durability

   • Ensure that view count data is safely stored and not lost in case of failures.
   • Implement regular backups and data recovery mechanisms.

5. Latency

   • Aim for sub-second latency for view count updates and retrievals.

6. Capacity

   • Plan for storage and processing capacity to handle billions of views.

7. Security

   • Protect against unauthorized access to view count data.
   • Ensure data integrity and confidentiality.

8. Monitoring and Logging

   • Implement logging for view count updates and access.
   • Set up monitoring to detect anomalies and performance issues.