IndexType

Enumerates the supported index algorithms for vector and scalar fields.

Go

type IndexType string

VALUES:

• Flat = "FLAT"

  Flat (brute-force) index. Exact but slow for large datasets.

• BinFlat = "BIN_FLAT"

  Flat index for binary vectors.

• IvfFlat = "IVF_FLAT"

  IVF with flat quantization. Good accuracy/speed balance.

• BinIvfFlat = "BIN_IVF_FLAT"

  IVF-Flat for binary vectors.

• IvfPQ = "IVF_PQ"

  IVF with product quantization. Memory-efficient.

• IvfSQ8 = "IVF_SQ8"

  IVF with 8-bit scalar quantization.

• IvfRabitQ = "IVF_RABITQ"

  IVF with RaBitQ quantization.

• HNSW = "HNSW"

  Hierarchical Navigable Small World graph. High recall and fast search.

• IvfHNSW = "IVF_HNSW"

  Combined IVF and HNSW index.

• AUTOINDEX = "AUTOINDEX"

  Automatically selects the best index type.

• DISKANN = "DISKANN"

  Disk-based ANN index for large-scale datasets.

• SCANN = "SCANN"

  ScaNN (Scalable Nearest Neighbors) index.

• MinHashLSH = "MINHASH_LSH"

  MinHash LSH index for set similarity.

• SparseInverted = "SPARSE_INVERTED_INDEX"

  Inverted index for sparse vectors.

• SparseWAND = "SPARSE_WAND"

  WAND algorithm for sparse vector search.

• GPUIvfFlat = "GPU_IVF_FLAT"

  GPU-accelerated IVF-Flat index.

• GPUIvfPQ = "GPU_IVF_PQ"

  GPU-accelerated IVF-PQ index.

• GPUCagra = "GPU_CAGRA"

  GPU-accelerated CAGRA graph index.

• GPUBruteForce = "GPU_BRUTE_FORCE"

  GPU-accelerated brute-force index.

• Trie = "Trie"

  Trie index for string fields.

• Sorted = "STL_SORT"

  Sorted index for scalar fields.

• Inverted = "INVERTED"

  Inverted index for scalar fields.

• BITMAP = "BITMAP"

  Bitmap index for low-cardinality scalar fields.

• RTREE = "RTREE"

  R-tree index for spatial data.

Example

Go

import (
    "context"

    "github.com/milvus-io/milvus/client/v2/index"
    "github.com/milvus-io/milvus/client/v2/milvusclient"
)

ctx, cancel := context.WithCancel(context.Background())
defer cancel()

milvusAddr := "127.0.0.1:19530"

cli, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: milvusAddr,
})
if err != nil {
    // handle error
}

defer cli.Close(ctx)

// Create an HNSW index on a float vector field
hnswIndex := index.NewHNSWIndex(index.MetricTypeL2, 16, 200)
_, err = cli.CreateIndex(ctx, milvusclient.NewCreateIndexOption(
    "my_collection", "embedding", hnswIndex))
if err != nil {
    // handle error
}

// Create an IVF_FLAT index
ivfIndex := index.NewIvfFlatIndex(index.MetricTypeL2, 128)
_, err = cli.CreateIndex(ctx, milvusclient.NewCreateIndexOption(
    "my_collection", "embedding2", ivfIndex))
if err != nil {
    // handle error
}