Evaluation of a Newsfeed System’s Design

Fulfill requirements#

Our non-functional requirements for the proposed newsfeed system design are scalability, fault tolerance, availability, and low latency. Let’s discuss how the proposed system fulfills these requirements:

1. Scalability: The proposed system is scalable to handle an ever-increasing number of users. The required resources, including load balancers, web servers, and other relevant servers, are added/removed on demand.

2. Fault tolerance: The replication of data consisting of users’ metadata, posts, and newsfeed makes the system fault-tolerant. Moreover, the redundant resources are always there to handle the failure of a server or its component.

3. Availability: The system is highly available by providing redundant servers and replicating data on them. When a user gets disconnected due to some fault in the server, the session is re-created via a load balancer with a different server. Moreover, the data (users metadata, posts, and newsfeeds) is stored on different and redundant database clusters, which provides high availability and durability.

4. Low latency: We can minimize the system’s latency at various levels by:

   • Geographically distributed servers and the cache associated with them. This way, we bring the service close to users.
   • Using CDNs for frequently accessed newsfeeds and media content.

Quiz on the newsfeed system’s design#

Test your understanding of the concepts related to the design of the newsfeed system with a quiz.