Publish shard CC-MAIN-2026-08/00036
Browse files- README.md +13 -13
- charts/compression_pie.png +0 -0
- charts/rows_chart.png +0 -0
- charts/size_chart.png +0 -0
- charts/timing_chart.png +0 -0
- data/CC-MAIN-2026-08/00036.parquet +3 -0
- stats.csv +2 -1
README.md
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all
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| Stage |
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~1.
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| Final Parquet (Zstd level 19) |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts
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End to end: ~
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### Processing Times
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Pipeline timings across
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```
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Pack (download + HTML→MD) ████████████████████████ total
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 3m
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 2m
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```
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### Personal and Sensitive Information
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Open Index is a large-scale web text dataset built from [Common Crawl](https://commoncrawl.org). Every page goes through a pipeline that extracts the main content from raw HTML, converts it to clean Markdown using [trafilatura](https://github.com/adbar/trafilatura), and packages the result into Parquet files with full WARC metadata preserved.
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The dataset currently includes crawl **CC-MAIN-2026-08** with **737,773 documents across 37 shards**. We plan to add more snapshots over time.
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Open Index is released under the **Open Data Commons Attribution License (ODC-By) v1.0**, the same license used by Common Crawl.
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### Compression Ratios
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Numbers below are actual measurements summed across all 37 files of CC-MAIN-2026-08 (737,773 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 37 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~30.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 92.6 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~1.5 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 1.0 GB | ~2.9 TB | **-31.1%** vs packed WARC |
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The big win is the HTML → Markdown step: trafilatura strips all tags, scripts, styles, navigation, and ads, keeping only the main content. This cuts 92.6 GB of uncompressed HTML down to 3.1 GB of markdown — a **98.4% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.6%.
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End to end: ~30.0 GB of raw gzipped WARCs becomes **1.0 GB of Parquet** — a **96.7% total reduction** — containing 737,773 clean markdown documents.
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### Processing Times
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Pipeline timings across 37 shards of CC-MAIN-2026-08:
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```
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Pack (download + HTML→MD) ████████████████████████ total 14m 59s avg 24s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 3m 27s avg 5s
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 2m 51s avg 4s
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```
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### Personal and Sensitive Information
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charts/compression_pie.png
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charts/rows_chart.png
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charts/size_chart.png
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charts/timing_chart.png
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data/CC-MAIN-2026-08/00036.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:f31a0c98fa78e96e6121bb43e4f9314fe2b7db65a7c124c0ea227836e6f8ff7c
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size 29843828
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stats.csv
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CC-MAIN-2026-08,32,19405,2562531576,93668802,30315860,2026-03-13T06:00:49Z,89,19,7
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CC-MAIN-2026-08,33,19518,2578498764,96012533,30445671,2026-03-13T06:02:40Z,78,18,10
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CC-MAIN-2026-08,34,19325,2535567258,94812059,30450886,2026-03-13T06:05:00Z,115,17,3
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CC-MAIN-2026-08,35,19398,2565260259,94010975,30284205,2026-03-13T06:06:
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CC-MAIN-2026-08,32,19405,2562531576,93668802,30315860,2026-03-13T06:00:49Z,89,19,7
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CC-MAIN-2026-08,33,19518,2578498764,96012533,30445671,2026-03-13T06:02:40Z,78,18,10
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CC-MAIN-2026-08,34,19325,2535567258,94812059,30450886,2026-03-13T06:05:00Z,115,17,3
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CC-MAIN-2026-08,35,19398,2565260259,94010975,30284205,2026-03-13T06:06:37Z,72,17,3
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CC-MAIN-2026-08,36,19367,2577531843,94004962,29843828,2026-03-13T06:08:05Z,69,18,0
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