Migrate from Faiss to Milvus

  1. Download F2M.yaml:
$ wget https://raw.githubusercontent.com/milvus-io/milvus-tools/main/yamls/F2M.yaml
  1. Set the following in the downloaded F2M.yaml:
  • data_path: Path to the data in Faiss.
  • dest_host: Milvus server address.
  • dest_port: Milvus server port.
  • mode: Mode of migration
    • Skip: Skip data migration if the specified collection or partition already exists.
    • Append: Append data if the specified collection or partition already exists.
    • Overwrite: Delete existing data before insertion if the specified collection or partition already exists.
  • dest_collection_name: Name of the collection to import data to.
  • dest_partition_name: Name of the partition to import data to.
  • collection_parameter: Collection-specific information such as vector dimension, index file size, and similarity metric.


  milvus_version: 2.x
  data_path: '/home/data/faiss.index'
  dest_host: ''
  dest_port: 19530
  mode: 'append'        # 'skip/append/overwrite'
  dest_collection_name: 'test'
  dest_partition_name: ''
    dimension: 256
    index_file_size: 1024
    metric_type: 'L2'
  1. Run MilvusDM:
$ milvusdm --yaml F2M.yaml

Sample Code

  1. Read Faiss data files to retrieve vectors and their corresponding IDs:
ids, vectors = faiss_data.read_faiss_data()
  1. Insert the retrieved data into Milvus:
insert_milvus.insert_data(vectors, self.dest_collection_name, self.collection_parameter, self.mode, ids, self.dest_partition_name)
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