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Jan 11, 2021 · Databases

Why eBay Switched Its Ad Analytics from Druid to ClickHouse – A Deep Dive

eBay’s ad data platform, originally built on a custom SQL engine and later migrated to Druid, was re‑engineered to use ClickHouse, highlighting challenges such as massive data volume, atomic offline replacements, schema design, compression, and operational simplifications, and demonstrating performance and scalability gains for advertisers.