Design Web Crawler — System Design Interview Practice
Design a web crawler that can discover and download billions of web pages efficiently. Work through the requirements, architecture trade-offs, and an interactive design review.
Requirements and concepts to consider
- Crawl billions of web pagesRequirement
- Respect robots.txt and crawl rate limitsRequirement
- Handle different content types (HTML, PDF, images)Requirement
- Detect and avoid duplicate contentRequirement
- Handle dynamic content (JavaScript)Requirement
- Prioritize important pagesRequirement
- Distributed crawling architectureRequirement
- Store crawled data efficientlyRequirement
- crawlingConcept to explore
- distributed systemsConcept to explore
- web scrapingConcept to explore
- data collectionConcept to explore