Content Deduplication Pipeline
Data EngineeringOur scraper pipelines were flooding the system with duplicate content—pages that already existed in our database were being reprocessed daily, triggering unnecessary downstream work and alerts. I implemented content-based deduplication by hashing page content at ingestion and comparing against stored hashes in Postgres. The challenge was balancing hash precision with storage costs, and handling partial updates without false negatives.
Result: 90% reduction in pipeline noise. Downstream systems stopped thrashing on unchanged data, and alert fatigue dropped dramatically.