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Reading data is slowly！ #126

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Lisennlp opened this issue Nov 2, 2023 · 1 comment
Open

Reading data is slowly！ #126

Lisennlp opened this issue Nov 2, 2023 · 1 comment

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@Lisennlp
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Lisennlp commented Nov 2, 2023 •
edited by StellaAthena
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I followed readme：

  git lfs clone https://huggingface.co/datasets/EleutherAI/pythia_deduped_pile_idxmaps
  python utils/unshard_memmap.py --input_file ./pythia_deduped_pile_idxmaps/pile_0.87_deduped_text_document-00000-of-00082.bin --num_shards 83 --output_dir ./pythia_pile_idxmaps/

I got a 600+G file, and then I used gpt-neox's dataloader to read the data, which was very slow. It takes about 6s to read 2048-length pieces of data. May I ask why?

image
@liu09114
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I get a file onlu 386G.. "386G Jan 30 13:28 pile_0.87_deduped_text_document.bin"
And I didn't get the '*.idx' file, should we use the download idx file directly?

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@liu09114 @Lisennlp