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Web Crawler Hits 1B Pages in 25 Hours for $462

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A developer successfully crawled 1.005 billion web pages in just over 24 hours using a cluster of optimized nodes, spending only $462 on AWS infrastructure. The project, documented in July 2025, demonstrates how modern hardware and clever engineering can dramatically reduce the cost and complexity of large-scale web crawling compared to similar efforts from 2012.

Each node ran a complete crawler stack with Redis for state management, fetchers using asyncio for high concurrency, and parsers to extract links from HTML. The system enforced strict politeness rules including robots.txt compliance and 70-second delays between requests to the same domain. By using instance storage instead of S3 and optimizing for vertical scaling before switching to a cluster approach, the developer achieved significant cost savings while maintaining fault tolerance for recovery.

The experiment revealed that despite the web becoming more dynamic and content-heavy, traditional HTML-only crawling remains viable for sampling purposes. The bottleneck shifted from network bandwidth to CPU processing, with fetchers supporting 6000-7000 async workers but still unable to saturate available bandwidth. This modern approach proves that bootstrapping a comprehensive web index is now achievable for individual developers with modest budgets.