[SYSTEM DESIGN] Web Crawler
PremiumDistributed web crawler at billion-page scale: BFS frontier, per-host politeness, Bloom-filter dedup, async fetcher pool, S3 + Kafka storage tier.
Premium unlocks the full interview-prep walkthrough
- Where the architecture fails first and how to defend the design.
- Concrete capacity math, data sizes, throughput, and scaling thresholds.
- ADR-style trade-offs you can turn into a structured interview answer.
- Runnable scenarios for happy path, failures, retries, and recovery.
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