Production-Grade Semantic Search: What Building RAG at Scale Really Requires

The gap between RAG tutorials and production systems is substantial, demanding careful attention to chunking strategies, re-ranking mechanisms, and infrastructure decisions that tutorials typically overlook. This insider perspective from a Microsoft Copilot infrastructure engineer reveals the practical complexities that determine success in real-world semantic search applications. Understanding these production lessons is essential for developers building reliable AI systems that must scale beyond proof-of-concept demos.