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Datasets:
Odeinjul
/
bigann-1b-static-search-eval

Tags:
approximate-nearest-neighbor
hnsw
bigann
static-search-eval
billion-scale-ann
License:
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The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
format: string
version: int64
space: string
dtype: string
dim: int64
distance_type: string
payload_bytes_per_vector: int64
index_file: string
index_file_size: int64
max_elements: int64
cur_element_count: int64
size_data_per_element: int64
label_offset: int64
offset_data: int64
max_M: int64
max_M0: int64
M: int64
ef_construction: int64
command: list<item: string>
  child 0, item: string
index_bytes: int64
threads: int64
ef_search: int64
sidecar: string
elapsed_seconds: int64
end_time: string
sidecar_jobs: int64
start_time: string
initial_active: int64
index_path: string
batch_size: int64
layout_sidecar: string
dataset: string
to
{'M': Value('int64'), 'batch_size': Value('int64'), 'command': List(Value('string')), 'dataset': Value('string'), 'dtype': Value('string'), 'ef_construction': Value('int64'), 'ef_search': Value('int64'), 'elapsed_seconds': Value('int64'), 'end_time': Value('string'), 'index_bytes': Value('int64'), 'index_path': Value('string'), 'initial_active': Value('int64'), 'layout_sidecar': Value('string'), 'sidecar': Value('string'), 'sidecar_jobs': Value('int64'), 'space': Value('string'), 'start_time': Value('string'), 'threads': Value('int64')}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 478, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2818, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2355, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2380, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2369, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2297, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              format: string
              version: int64
              space: string
              dtype: string
              dim: int64
              distance_type: string
              payload_bytes_per_vector: int64
              index_file: string
              index_file_size: int64
              max_elements: int64
              cur_element_count: int64
              size_data_per_element: int64
              label_offset: int64
              offset_data: int64
              max_M: int64
              max_M0: int64
              M: int64
              ef_construction: int64
              command: list<item: string>
                child 0, item: string
              index_bytes: int64
              threads: int64
              ef_search: int64
              sidecar: string
              elapsed_seconds: int64
              end_time: string
              sidecar_jobs: int64
              start_time: string
              initial_active: int64
              index_path: string
              batch_size: int64
              layout_sidecar: string
              dataset: string
              to
              {'M': Value('int64'), 'batch_size': Value('int64'), 'command': List(Value('string')), 'dataset': Value('string'), 'dtype': Value('string'), 'ef_construction': Value('int64'), 'ef_search': Value('int64'), 'elapsed_seconds': Value('int64'), 'end_time': Value('string'), 'index_bytes': Value('int64'), 'index_path': Value('string'), 'initial_active': Value('int64'), 'layout_sidecar': Value('string'), 'sidecar': Value('string'), 'sidecar_jobs': Value('int64'), 'space': Value('string'), 'start_time': Value('string'), 'threads': Value('int64')}
              because column names don't match

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bigann-1b-static-search-eval

Static BIGANN 1B search-evaluation HNSW index artifact. This Hugging Face dataset repository is intended to publish the rebuilt 1B HNSW index and its layout sidecar files. The original base/query/ground-truth files are from the Big ANN Benchmarks public BIGANN release.

Uploaded Scope

This repository upload contains the index artifacts only:

  • HNSW index: index_m_32_ef_500
  • HNSW metadata sidecar: index_m_32_ef_500.hnswmeta.json
  • Layout sidecar manifest: layout-sidecar/index_m_32_ef_500.layout.json
  • Layout sidecar levels: layout-sidecar/index_m_32_ef_500.levels.u16
  • Layout sidecar id mapping: layout-sidecar/index_m_32_ef_500.id_mapping.u32
  • Build manifest: index_build.json

The base vectors, public queries, ground truth, and PQ artifacts are not part of this initial Hugging Face upload unless separately added later.

Source Data

  • Base vectors: base.1B.u8bin from https://dl.fbaipublicfiles.com/billion-scale-ann-benchmarks/bigann/base.1B.u8bin
  • Public queries: query.public.10K.u8bin from https://dl.fbaipublicfiles.com/billion-scale-ann-benchmarks/bigann/query.public.10K.u8bin
  • 1B ground truth: GT_1B_v2.tgz/GT_1B/bigann-1B from https://dl.fbaipublicfiles.com/billion-scale-ann-benchmarks/GT_1B_v2.tgz

The Big ANN Benchmarks page lists BIGANN as CC0.

Dataset Properties

  • Vector count: 1000000000
  • Dimension: 128
  • Dtype: uint8
  • Metric: l2
  • Query count: 10000
  • Ground truth neighbors per query: 100

HNSW Index

  • Index file: index_m_32_ef_500
  • Index size: 404258279176 bytes
  • Parameters: M=32, ef_construction=500
  • hnswlib space: l2
  • Index dtype: uint8
  • Initial active vectors: 1000000000
  • Build threads: 224
  • Build start: 2026-07-16 14:38:44 UTC
  • Build end: 2026-07-17 06:44:34 UTC
  • Build elapsed seconds: 57950

Layout Sidecar

The layout sidecar is generated from the completed HNSW index for direct runtime loading by vectordb-cxl.

  • Layout manifest: layout-sidecar/index_m_32_ef_500.layout.json
  • Levels file: layout-sidecar/index_m_32_ef_500.levels.u16
  • Levels size: 2000000000 bytes
  • Id mapping file: layout-sidecar/index_m_32_ef_500.id_mapping.u32
  • Id mapping size: 4000000000 bytes
  • size_data_per_element: 396
  • label_offset: 388
  • vector_offset: 260
  • Max observed level: 6
  • Levels checksum: fnv1a64:1b0268c2a1076203
  • Id mapping checksum: fnv1a64:9d097ab13497f155
  • Index header checksum: fnv1a64:9b39a0e6778b9f9f

Environment

  • Machine CPU threads: 224
  • Python: Python 3.10.12
  • hnswlib git commit: fe873b1cee484795bd254088c0d4579f567f1979
  • vectordb-cxl commit: 0a84464f5f3347b19febde9b0a96617e58f01268

Download 

hf download Odeinjul/bigann-1b-static-search-eval \
  --repo-type dataset \
  --include "index_m_32_ef_500" \
  --include "index_m_32_ef_500.hnswmeta.json" \
  --include "index_build.json" \
  --include "layout-sidecar/*" \
  --local-dir bigann-1b-static-search-eval

Expected index artifact size is approximately 404.3 GB, plus approximately 6.0 GB for layout sidecar files.

Notes

This artifact was built from the original BIGANN 1B base vectors using M=32 and ef_construction=500. For reproducibility and exact build arguments, inspect index_build.json.
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Total file size:
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