Edouard and Ott, Myle and Zettlemoyer, Luke and Stoyanov, Veselin}

journal={arXiv preprint arXiv:1911.02116},
year={2019}
}

CC-Net is a pipeline for mining and reproducing content from the web. Given the computation cost of running the full pipeline, we distributed the computation on a Slurm cluster using submitit. Submitit will default to spawning processes on your machine if a Slurm cluster is found. You should tweak --task_parallelism to something adapted to your machine. Defaults are 512 for mining and 20 for reproducing. To run the tasks in-process use --execution debug.

Output Format

Generated files are compressed JSON files. There is one JSON object per line.

List of Fields:

• url: Webpage URL (part of CC)
• date_download: Date of download (part of CC)
• digest: SHA1 digest of the webpage (part of CC)
• length: Number of chars
• nlines: Number of lines
• source_domain: Web domain of the webpage
• title: Page title (part of CC)
• raw_content: Webpage content after deduplication
• original_nlines: Number of lines before deduplication
• original_length: Number of chars before deduplication
• language: Language detected by FastText LID
• language_score: Language score
• perplexity: Perplexity of a LM trained on Wikipedia

Sample JSON Object:

{
"url": "http://www.pikespeakhospice.org/members/1420",
"date_download": "2019-02-15T18:40:25Z",
"digest": "sha1:VQW3KXUOALO543IJGTK2JLVEAN2XXKHI",
"length": 752,
"nlines": 5,
"source_domain": "www.pikespeakhospice.org",
"title": "LeeRoy Aragon",
"raw_content": "Date Honored: March 2017\nHe was a man of integrity, a hard worker, and a dedicated family man. He loved spending time with family camping, fishing, hunting, boating and just hanging out.\nHis Catholic faith was extremely important to him as he gave of his time and talents to the community. He had many friends through church and the Knights of Columbus. He was a meticulous handyman, and enjoyed building and fixing things and restoring antique furniture to perfection. He was a fan and supported his Colorado Rockies and Denver Broncos. Throughout the years he had devoted four-legged friends (his dogs and a horse named Sunny Boy).\nWe have many cherished memories of him that we will treasure until we are with him again.\n~ Family of LeeRoy F. Aragon",
"original_nlines": 7,
"original_length": 754,
"language": "en",
"language_score": 0.99,
"perplexity": 255.11
}

You can peak at those files using UNIX tools zcat and jq, eg:

zcat data/mined/2019-09/en_head_0000.json.gz | head -1 | jq .

jq can do some complicated filtering.

JSONQL.py provides a Python API with multiprocess support to do more complicated operations like LM scoring of the document.

License

By contributing to cc_net, you agree that your contributions will be licensed under the LICENSE file in the root directory of this source tree.

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