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#WebCrawler

2 guides~23 min totalupdated Oct 24, 2026
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Design a Web Crawler: One Queue Per Host (2026)

Design a web crawler in a system design interview: a frontier with a queue per host, politeness, robots.txt, Bloom filter dedupe, leases and recrawl.

Intermediate · 14 min
Software Architecture
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Advanced9 minWeb Crawler Follow-Ups: Failure Modes, Near-Duplicates and Security (2026) Web crawler depth for system design interviews: failure of each component, SimHash near-duplicates, crawl traps, SSRF, monitoring, cost and follow-up questions.

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