Creating a Live Comment Feature for a Mobile App

💡The live comment feature allows users to see comments in real-time while viewing content on the app.

🔧The feature includes creating and reading comments, ordering comments by time, and displaying live comments as they are typed.

📈Based on user assumptions, an estimated 40 million comments per day can be generated on the platform.

🌐To ensure high availability and eventual consistency, a quorum-based system can be implemented.

⚡️The system should be designed to handle a large user base and high comment activity.

What is the purpose of the live comment feature?

—The live comment feature allows users to see comments in real-time while viewing content on the app. This enhances user engagement and provides a more interactive experience.

What functionalities are included in the live comment feature?

—The feature includes creating and reading comments, ordering comments by time, and displaying live comments as they are typed. It focuses on providing a seamless and real-time commenting experience for users.

How many comments can be expected per day?

—Based on user assumptions, an estimated 40 million comments can be generated on the platform per day. This number may vary based on the user base and activity level.

How can the system handle high comment activity?

—To ensure high availability and eventual consistency, a quorum-based system can be implemented. This allows for a distributed and scalable architecture that can handle a large number of comments and concurrent user interactions.

What design considerations should be made for this feature?

—The system should be designed to handle a large user base and high comment activity. Considerations should include data partitioning, load balancing, caching, and efficient querying to provide a seamless and responsive user experience.

00:00Introduction to the live comment feature and its importance.

02:30Functionalities of the live comment feature, including creating and reading comments, ordering comments by time, and displaying live comments as they are typed.

05:45Discussion about the potential number of comments generated per day and the impact on system design.

08:15Considerations for ensuring high availability and eventual consistency in the system architecture.

10:30Design considerations for handling a large user base and high comment activity.