Publish 3 shards CC-MAIN-2026-08/03805–03868
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/03805.parquet +3 -0
- data/CC-MAIN-2026-08/03845.parquet +3 -0
- data/CC-MAIN-2026-08/03868.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 **135,
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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) | 16.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~286.
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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 16.3 TB of uncompressed HTML down to 608.
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End to end: ~5.8 TB of raw gzipped WARCs becomes **
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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
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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 42h
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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 **135,883,846 documents across 7288 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 7288 files of CC-MAIN-2026-08 (135,883,846 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 7288 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~5.8 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 16.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~286.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 193.0 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 16.3 TB of uncompressed HTML down to 608.7 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 **193.0 GB of Parquet** — a **96.7% total reduction** — containing 135,883,846 clean markdown documents.
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### Processing Times
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Pipeline timings across 7288 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 488h 4m 21s avg 4m 1s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h 28m 28s avg 55s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 42h 57m 59s avg 21s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03805.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:316bb53322ebe0fecc2b35447d2035d6849a1b5525b3e17af9dd8e90a4218ded
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size 30160474
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data/CC-MAIN-2026-08/03845.parquet
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version https://git-lfs.github.com/spec/v1
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size 29819355
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data/CC-MAIN-2026-08/03868.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:5340f8a1aac537c09c994d46cf6224ff5caf281d8c58896619ea7ab9443352a6
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size 29831080
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stats.csv
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@@ -3794,7 +3794,8 @@ CC-MAIN-2026-08,3799,19536,2592850263,90443052,29198679,2026-03-17T06:22:47Z,131
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| 3794 |
CC-MAIN-2026-08,3801,19464,2568550823,93428326,29330613,2026-03-17T06:27:47Z,199,0,18,18
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CC-MAIN-2026-08,3802,19433,2561919601,96165099,30523725,2026-03-17T06:30:47Z,175,0,23,36
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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,
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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-2026-08,3814,19471,2588388404,95609519,29769349,2026-03-17T05:19:47Z,109,0,24,11
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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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@@ -3819,12 +3820,14 @@ CC-MAIN-2026-08,3838,19676,2643662493,92421058,29217938,2026-03-17T06:22:47Z,126
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CC-MAIN-2026-08,3840,19824,2604645649,98117163,31260679,2026-03-17T06:27:47Z,192,0,20,18
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CC-MAIN-2026-08,3844,19290,2571976845,88138668,28375959,2026-03-17T06:39:17Z,185,0,23,
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CC-MAIN-2026-08,3863,19136,2568351093,99368510,32321209,2026-03-17T06:26:02Z,111,0,26,10
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CC-MAIN-2026-08,3864,19548,2574110045,95496920,30202016,2026-03-17T06:27:47Z,174,0,20,18
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CC-MAIN-2026-08,3865,19410,2544755697,95772161,29378374,2026-03-17T06:33:32Z,196,0,21,10
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CC-MAIN-2026-08,3866,19352,2574890213,94290577,29713932,2026-03-17T06:35:17Z,178,0,25,45
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CC-MAIN-2026-08,3867,19365,2566702984,91345393,28809689,2026-03-17T06:39:17Z,176,0,28,
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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-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
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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-2026-08,3801,19464,2568550823,93428326,29330613,2026-03-17T06:27:47Z,199,0,18,18
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CC-MAIN-2026-08,3802,19433,2561919601,96165099,30523725,2026-03-17T06:30:47Z,175,0,23,36
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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-2026-08,3805,19412,2614909216,93303873,30160474,2026-03-17T06:42:17Z,179,0,22,0
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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-2026-08,3814,19471,2588388404,95609519,29769349,2026-03-17T05:19:47Z,109,0,24,11
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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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| 3820 |
CC-MAIN-2026-08,3840,19824,2604645649,98117163,31260679,2026-03-17T06:27:47Z,192,0,20,18
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CC-MAIN-2026-08,3841,19412,2585690910,93321934,28783813,2026-03-17T06:30:47Z,185,0,21,36
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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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| 3823 |
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CC-MAIN-2026-08,3844,19290,2571976845,88138668,28375959,2026-03-17T06:39:17Z,185,0,23,25
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CC-MAIN-2026-08,3845,19583,2607337841,93551362,29819355,2026-03-17T06:42:17Z,169,0,27,0
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CC-MAIN-2026-08,3863,19136,2568351093,99368510,32321209,2026-03-17T06:26:02Z,111,0,26,10
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CC-MAIN-2026-08,3864,19548,2574110045,95496920,30202016,2026-03-17T06:27:47Z,174,0,20,18
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CC-MAIN-2026-08,3865,19410,2544755697,95772161,29378374,2026-03-17T06:33:32Z,196,0,21,10
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CC-MAIN-2026-08,3866,19352,2574890213,94290577,29713932,2026-03-17T06:35:17Z,178,0,25,45
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CC-MAIN-2026-08,3867,19365,2566702984,91345393,28809689,2026-03-17T06:39:17Z,176,0,28,25
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CC-MAIN-2026-08,3868,19698,2624036880,92996973,29831080,2026-03-17T06:42:17Z,154,0,33,0
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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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| 3832 |
CC-MAIN-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
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| 3833 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
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