Publish shard CC-MAIN-2026-08/00005
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00005.parquet +2 -2
- 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) | ~
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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 — avg —
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Export (Parquet) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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Publish (HuggingFace) ░░░░░░░░░░░░░░░░░░░░░░░░ total
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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 **329,839 documents across 16 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 16 files of CC-MAIN-2026-08 (329,839 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 16 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~13.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 42.3 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~603.8 MB | ~3.7 TB | **-98.6%** vs HTML |
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| Final Parquet (Zstd level 19) | 422.6 MB | ~2.9 TB | **-30.0%** 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 42.3 GB of uncompressed HTML down to 1.3 GB of markdown — a **98.6% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.1%.
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End to end: ~13.0 GB of raw gzipped WARCs becomes **422.6 MB of Parquet** — a **96.8% total reduction** — containing 329,839 clean markdown documents.
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### Processing Times
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Pipeline timings across 16 shards of CC-MAIN-2026-08:
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```
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Pack (download + HTML→MD) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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Export (Parquet) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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Publish (HuggingFace) ░░░░░░░░░░░░░░░░░░░░░░░░ total 53s avg 3s
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```
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### Personal and Sensitive Information
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data/CC-MAIN-2026-08/00005.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:
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size
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version https://git-lfs.github.com/spec/v1
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oid sha256:b6ea4a1f0de66b13682e14cd8f8cf14709bec754223075fbd857ad3b8a88ba7e
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size 26291277
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stats.csv
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CC-MAIN-2026-08,11,21500,3018399621,82011226,27131705,2026-03-13T05:45:39Z,0,0,5
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CC-MAIN-2026-08,12,19385,2581304754,93043029,29388150,2026-03-13T05:45:48Z,0,0,6
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CC-MAIN-2026-08,13,19247,2567985839,94464633,30207204,2026-03-13T05:45:55Z,0,0,3
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CC-MAIN-2026-08,14,19476,2599198052,93462608,30191956,2026-03-13T05:
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CC-MAIN-2026-08,11,21500,3018399621,82011226,27131705,2026-03-13T05:45:39Z,0,0,5
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CC-MAIN-2026-08,12,19385,2581304754,93043029,29388150,2026-03-13T05:45:48Z,0,0,6
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CC-MAIN-2026-08,13,19247,2567985839,94464633,30207204,2026-03-13T05:45:55Z,0,0,3
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CC-MAIN-2026-08,14,19476,2599198052,93462608,30191956,2026-03-13T05:46:15Z,0,0,17
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CC-MAIN-2026-08,15,19509,2602820538,92725066,29817208,2026-03-13T05:46:15Z,0,0,0
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