metadata

dataset_info:
  features:
    - name: text
      dtype: string
    - name: meta
      struct:
        - name: pile_set_name
          dtype: string
  splits:
    - name: train
      num_bytes: 49692872
      num_examples: 1000
    - name: validation
      num_bytes: 115675626
      num_examples: 2434
    - name: test
      num_bytes: 113239914
      num_examples: 2407
  download_size: 130132115
  dataset_size: 278608412
configs:
  - config_name: default
    data_files:
      - split: train
        path: data/train-*
      - split: validation
        path: data/validation-*
      - split: test
        path: data/test-*

Sample of the arxiv partition of The Pile.

The training set is just a random sample of 1000 documents from the 00.jsonl.zst (the first file in The Pile; it seems each jsonl.zst file is already a random sample).
The validation and test set are the full sets.

Statistics

Training Set

Mean number of tokens: 14588.022
Std number of tokens: 26015.51379449416
Max number of tokens: 746616
Min number of tokens: 33