Listing vectors - Amazon Simple Storage Service
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Listing vectors

Note

Amazon S3 Vectors is in preview release for Amazon Simple Storage Service and is subject to change.

You can list vectors in a vector index with the ListVectors API operation. For more information about the maximum number of vectors that can be returned per page, see Limitations and restrictions. The response includes a pagination token when results are truncated. For more information about the response elements of ListVectors, see ListVectors in the Amazon S3 API Reference. You can also use ListVectors to export vector data from a specified vector index. ListVectors is strongly consistent. After a WRITE operation, you can immediately list vectors with all changes reflected.

To list vectors, use the following example commands. Replace the user input placeholders with your own information.

The segment-count and segment-index parameters allow you to partition your listing operations across multiple parallel requests. When you specify a segment-count value (such as 2), you divide the index into that many segments. The segment-index parameter (starting from 0) determines which segment to list. This approach helps improve performance when listing large vector indexes by enabling parallel processing. For more information about segment-count and segment-index, see ListVectors in the Amazon S3 API Reference.

To list all vectors in an index

Example request:

aws s3vectors list-vectors \
  --vector-bucket-name "amzn-s3-demo-vector-bucket" \
  --index-name "idx" \
  --segment-count 2 \
  --segment-index 0 \
  --return-data \
  --return-metadata

Example response:

{
    "vectors": [
        {
            "key": "vec3",
            "data": {
                "float32": [0.4000000059604645]
            },
            "metadata": {
                "nonFilterableKey": "val4",
                "filterableKey": "val2"
            }
        }
    ]
}

To list vectors with pagination

Example request:

aws s3vectors list-vectors \
  --vector-bucket-name "amzn-s3-demo-vector-bucket" \
  --index-name "idx" \
  --segment-count 2 \
  --segment-index 0 \
  --return-data \
  --return-metadata \
  --next-token "zWfh7e57H2jBfBtRRmC7OfMwl209G9dg3j2qM6kM4t0rps6ClYzJykgMOil9eGqU5nhf_gTq53IfoUdTnsg"

Example response:

{
    "vectors": [
        {
            "key": "vec1",
            "data": {
                "float32": [0.5]
            },
            "metadata": {
                "nonFilterableKey": "val2",
                "filterableKey": "val1"
            }
        }
    ]
}