Beyond Simple Similarity Search: Advanced Retrieval Techniques for Production RAG Systems

Author(s): MahendraMedapati

Originally published on Towards AI.

A comprehensive guide to building sophisticated retrieval systems that deliver precise, diverse, and relevant results

Advanced retrieval systems combine multiple techniques for optimal results

This article explores advanced retrieval techniques for Production RAG (Retrieval-Augmented Generation) systems, emphasizing the inadequacies of basic similarity searches, and introducing four critical pillars: Dense vs Sparse Retrieval, Hybrid Search, Re-ranking Strategies, and Maximum Marginal Relevance (MMR). The author illustrates how these advanced methods can provide not only similar results but the *right* content, helping to meet the diverse needs of users and ensure a richer, more comprehensive search experience across applications in different domains.

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Published via Towards AI