Publish 3 shards CC-MAIN-2026-08/03808–03871
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/03808.parquet +3 -0
- data/CC-MAIN-2026-08/03848.parquet +3 -0
- data/CC-MAIN-2026-08/03871.parquet +3 -0
- stats.csv +6 -3
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) | ~5.8 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 16.
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| Packed markdown WARC (.md.warc.gz) | ~286.
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| Final Parquet (Zstd level 19) | 193.
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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 16.
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End to end: ~5.8 TB of raw gzipped WARCs becomes **193.
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### Processing Times
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Pipeline timings across
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```
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Download (raw WARC) ████████████████████████ total 488h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 43h
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```
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### Dataset Charts
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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 **136,000,612 documents across 7294 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 7294 files of CC-MAIN-2026-08 (136,000,612 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 7294 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~5.8 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 16.4 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~286.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 193.2 GB | ~2.9 TB | **-32.5%** 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 16.4 TB of uncompressed HTML down to 609.2 GB of markdown — a **98.3% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 68.3%.
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End to end: ~5.8 TB of raw gzipped WARCs becomes **193.2 GB of Parquet** — a **96.7% total reduction** — containing 136,000,612 clean markdown documents.
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### Processing Times
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Pipeline timings across 7294 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 488h 20m 6s avg 4m 1s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h 31m 26s avg 55s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 43h 1m 29s avg 21s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03808.parquet
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version https://git-lfs.github.com/spec/v1
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size 29174520
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data/CC-MAIN-2026-08/03848.parquet
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version https://git-lfs.github.com/spec/v1
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size 30122454
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data/CC-MAIN-2026-08/03871.parquet
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version https://git-lfs.github.com/spec/v1
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size 29508923
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stats.csv
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@@ -3796,7 +3796,8 @@ CC-MAIN-2026-08,3802,19433,2561919601,96165099,30523725,2026-03-17T06:30:47Z,175
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CC-MAIN-2026-08,3803,19782,2629539758,97207170,30244499,2026-03-17T06:35:17Z,198,0,24,45
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CC-MAIN-2026-08,3804,19795,2663814229,95596723,29715909,2026-03-17T06:39:17Z,201,0,18,25
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-
CC-MAIN-2026-08,3806,19264,2569926980,88288986,28523471,2026-03-17T06:46:02Z,159,0,17,
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CC-MAIN-2026-08,3813,19530,2566347087,91041349,28673971,2026-03-17T05:17:47Z,104,0,29,8
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CC-MAIN-2026-08,3842,19163,2523448898,91742511,29257825,2026-03-17T06:35:17Z,149,0,39,45
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CC-MAIN-2026-08,3868,19698,2624036880,92996973,29831080,2026-03-17T06:42:17Z,154,0,33,41
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CC-MAIN-2026-08,3869,19401,2595591799,94361981,30643086,2026-03-17T06:46:02Z,120,0,49,
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CC-MAIN-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
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CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
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CC-MAIN-2026-08,3806,19264,2569926980,88288986,28523471,2026-03-17T06:46:02Z,159,0,17,29
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CC-MAIN-2026-08,3816,19450,2602257308,94180181,28967115,2026-03-17T05:25:17Z,114,0,20,14
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CC-MAIN-2026-08,3846,19650,2612806706,98947626,30896189,2026-03-17T06:46:02Z,177,0,21,29
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CC-MAIN-2026-08,3869,19401,2595591799,94361981,30643086,2026-03-17T06:46:02Z,120,0,49,29
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CC-MAIN-2026-08,3871,19476,2616117602,93489074,29508923,2026-03-17T06:49:02Z,164,0,46,0
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