FAISS Index Types for Production RAG
·420 words·2 mins
IndexFlatIP works for small corpora. For production with 100K+ vectors, you need smarter indexes. Here’s how to choose and implement them.
FAISS Index Types Overview # Index Corpus Size Memory Accuracy Build Time IndexFlatIP < 50K High Exact Fast IndexIVFFlat 50K - 1M Medium ~95-99% Medium IndexHNSWFlat 50K - 10M High ~95-99% Slow IndexIVFPQ 1M+ Low ~90-95% Slow IndexFlatIP (Baseline) # Exact search, no training required. Use for prototypes and small corpora.