In the system, each service is described below:

Application servers: The application servers receive user requests and forward them to the relevant services. Their main purpose is to host, manage, and execute applications, execute user requests, and manage connections with databases and other services.
Search service: This service helps users to find relevant courses on the platform.
Shopping cart service: This service is responsible for keeping the courses that are selected by the users for purchase.
Order management service: This service is responsible for the entire process, from order placement to order fulfillment. It includes tasks like validating orders, processing payments, handling returns and refunds, and offering customer support.
Recommendation service: This service provides personalized content recommendations to users based on their preferences, behavior, and learning goals.
Video processing service: This service handles the tasks of video transcoding, uploading, and on-demand streaming for video tutorials. Its primary users are the administrators who rely on it to upload educational videos.
Content delivery network (CDN): The CDN distributes web content consisting of HTML pages, JavaScript files, images, videos, and other media files to users in various geographic locations.
Pub-sub service: The pub-sub service decouples different services and enables asynchronous communication between them.

AI Evaluation of Building Blocks in Online Education System

Online education system