January 26, 2023
Data Structures & Algorithms System Design Interview
- Overview
A web crawler service, such as Google Search, is a system that automatically visits web pages and retrieves information from them. It is used to index web pages for search engines, monitor websites for changes, and create web archives.
- System Components
The web crawler service consists of several components:
• Web Crawler: This is the main component of the system. It is responsible for visiting web pages, retrieving information from them, and indexing them.
• Indexer: This component is responsible for storing the retrieved information in an index. This index is used by the search engine to quickly find relevant web pages.
• Search Engine: This component is responsible for processing user queries and returning relevant web pages from the index.
• User Interface: This component is responsible for providing a user-friendly interface for users to enter their queries and view the results.
- System Architecture
The web crawler service is composed of several components that interact with each other. The following diagram illustrates the system architecture:
- System Process
The web crawler service follows the following process:
• The web crawler visits web pages and retrieves information from them.
• The indexer stores the retrieved information in an index.
• The search engine processes user queries and returns relevant web pages from the index.
• The user interface displays the results to the user.
*** Created by ChatGPT on Jan 26, 2023.
