What index types does Milvus support?

Milvus supports a wide range of index types including FLAT for exact search, IVF_FLAT, IVF_SQ8, IVF_PQ for inverted file indexes with various quantization, HNSW for graph-based search, SCANN for Google's research-backed ANN, DiskANN for disk-based large-scale search, and GPU-accelerated variants like GPU_IVF_FLAT and GPU_CAGRA. This variety lets teams choose the best index for their data size, recall target, and hardware, from high-recall HNSW in RAM to massive DiskANN indexes on SSD to GPU-accelerated batch processing.