OpenSearchCon Europe 2025

Scaling vector search to a billion vectors isn’t just a technical challenge—it’s a high-stakes balancing act of latency, cost, and quality. In this talk, I’ll share practical lessons learned from building a billion-scale system in OpenSearch, covering model selection, text processing, hardware essentials, and embedding strategies. But that’s not all: I’ll expose the tips, tricks, and gotchas you’ll need to navigate OpenSearch’s quirks without losing your sanity (or your wallet). Whether you’re scaling up or just getting started, this session will equip you to tame your vectors and succeed at scale.