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# original dataset: https://huggingface.co/datasets/ezipe/lichess_2023_janoct
# you'll need around 6TB or so for this. it'll take around 8 hours or so
import os
NUM_SPLITS = 32
def SPLIT_CMD(fname, num=32):
return f'split -d -n l/{num} {fname} {fname}.'
# for each file in dir that ends in zstd: uncompress, save fnames
fnames = []
for fname in os.listdir():
if fname.endswith('.zst') and os.path.getsize(fname) > 15072192300:
#os.system(f'unzstd -T0 {fname}')
fnames.append(fname[:-4])
# split each
#for fname in fnames:
# os.system(SPLIT_CMD(fname, NUM_SPLITS))
# recompress each
for fname in fnames:
for i in range(NUM_SPLITS):
rm = (f'rm {fname}.{i:02d}.zst')
os.system(rm)
cm = (f'zstd -T0 {fname}.{i:02d}')
print(cm)
os.system(cm)
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