Publish 3 shards CC-MAIN-2026-08/03784–03892
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/03784.parquet +3 -0
- data/CC-MAIN-2026-08/03856.parquet +3 -0
- data/CC-MAIN-2026-08/03892.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 **136,
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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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~5.8 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 16.5 TB | ~295 TB | — |
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| 173 |
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| Packed markdown WARC (.md.warc.gz) | ~288.
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| Final Parquet (Zstd level 19) | 194.
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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 16.5 TB of uncompressed HTML down to 613.
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End to end: ~5.8 TB of raw gzipped WARCs becomes **194.
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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 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 **136,937,331 documents across 7342 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 7342 files of CC-MAIN-2026-08 (136,937,331 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 7342 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) | 16.5 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~288.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 194.5 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 16.5 TB of uncompressed HTML down to 613.5 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 **194.5 GB of Parquet** — a **96.7% total reduction** — containing 136,937,331 clean markdown documents.
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### Processing Times
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Pipeline timings across 7342 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 490h 3m 54s avg 4m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h 50m 6s avg 55s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 43h 25m 30s avg 21s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03784.parquet
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data/CC-MAIN-2026-08/03856.parquet
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version https://git-lfs.github.com/spec/v1
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data/CC-MAIN-2026-08/03892.parquet
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version https://git-lfs.github.com/spec/v1
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size 29167077
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stats.csv
CHANGED
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@@ -3784,6 +3784,7 @@ CC-MAIN-2026-08,3780,19410,2570025021,95259821,29932495,2026-03-17T07:09:47Z,91,
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|
| 3784 |
CC-MAIN-2026-08,3781,19404,2583276945,90583350,29653081,2026-03-17T05:36:02Z,214,0,41,47
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| 3785 |
CC-MAIN-2026-08,3782,19839,2626486825,92610103,29440267,2026-03-17T05:38:32Z,117,0,31,14
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CC-MAIN-2026-08,3783,19443,2592219168,94732660,30118327,2026-03-17T05:42:32Z,167,0,26,18
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|
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| 3787 |
CC-MAIN-2026-08,3785,19376,2576474028,97185069,30961486,2026-03-17T05:46:02Z,167,0,32,59
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CC-MAIN-2026-08,3786,19435,2566711179,94820562,30373142,2026-03-17T05:50:32Z,192,0,25,10
|
| 3789 |
CC-MAIN-2026-08,3787,19420,2596365494,93996847,29340119,2026-03-17T07:09:47Z,165,0,20,35
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|
@@ -3806,7 +3807,7 @@ CC-MAIN-2026-08,3803,19782,2629539758,97207170,30244499,2026-03-17T06:35:17Z,198
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|
| 3806 |
CC-MAIN-2026-08,3804,19795,2663814229,95596723,29715909,2026-03-17T06:39:17Z,201,0,18,25
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CC-MAIN-2026-08,3807,19763,2634047912,97023938,30612088,2026-03-17T07:34:02Z,202,0,20,
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CC-MAIN-2026-08,3810,19787,2622497429,92580755,30078686,2026-03-17T06:58:02Z,121,0,25,31
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|
@@ -3845,11 +3846,12 @@ CC-MAIN-2026-08,3846,19650,2612806706,98947626,30896189,2026-03-17T06:46:02Z,177
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| 3845 |
CC-MAIN-2026-08,3848,19544,2603467536,93476329,30122454,2026-03-17T06:49:02Z,148,0,25,53
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CC-MAIN-2026-08,3850,19505,2586040838,95227686,30295736,2026-03-17T06:58:02Z,97,0,29,31
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| 3848 |
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CC-MAIN-2026-08,3851,19497,2608009877,95229414,29892717,2026-03-17T07:34:02Z,162,0,21,
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| 3849 |
CC-MAIN-2026-08,3852,19439,2606300625,99921094,30536511,2026-03-17T06:58:02Z,133,0,36,31
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CC-MAIN-2026-08,3853,19421,2600785460,95558432,29812564,2026-03-17T07:01:47Z,91,0,25,23
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| 3851 |
CC-MAIN-2026-08,3854,19415,2580147551,97415893,31764437,2026-03-17T07:04:32Z,121,0,28,54
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| 3852 |
CC-MAIN-2026-08,3855,19536,2614933792,94440391,30708513,2026-03-17T07:04:32Z,107,0,22,54
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|
|
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| 3853 |
CC-MAIN-2026-08,3857,19572,2605718759,94764147,30438669,2026-03-17T07:09:47Z,155,0,30,35
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CC-MAIN-2026-08,3858,19557,2611361839,95428677,29726773,2026-03-17T07:13:17Z,117,0,26,30
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| 3855 |
CC-MAIN-2026-08,3859,19663,2601629835,90661267,29135991,2026-03-17T07:13:17Z,109,0,22,30
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|
@@ -3878,7 +3880,8 @@ CC-MAIN-2026-08,3886,19573,2588278452,96961196,30480525,2026-03-17T07:23:47Z,95,
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| 3878 |
CC-MAIN-2026-08,3887,19488,2580251210,92805330,29610039,2026-03-17T07:23:47Z,98,0,18,29
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CC-MAIN-2026-08,3888,19618,2608547117,93048561,29627684,2026-03-17T07:27:47Z,106,0,22,5
|
| 3880 |
CC-MAIN-2026-08,3890,19360,2572825048,95051132,29779976,2026-03-17T07:29:47Z,177,0,22,15
|
| 3881 |
-
CC-MAIN-2026-08,3891,19416,2579000345,92498587,28615014,2026-03-17T07:34:02Z,175,0,21,
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|
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| 3882 |
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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| 3884 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
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|
|
|
| 3784 |
CC-MAIN-2026-08,3781,19404,2583276945,90583350,29653081,2026-03-17T05:36:02Z,214,0,41,47
|
| 3785 |
CC-MAIN-2026-08,3782,19839,2626486825,92610103,29440267,2026-03-17T05:38:32Z,117,0,31,14
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CC-MAIN-2026-08,3783,19443,2592219168,94732660,30118327,2026-03-17T05:42:32Z,167,0,26,18
|
| 3787 |
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CC-MAIN-2026-08,3784,19465,2621875982,96366472,30346324,2026-03-17T07:36:47Z,94,0,19,0
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CC-MAIN-2026-08,3785,19376,2576474028,97185069,30961486,2026-03-17T05:46:02Z,167,0,32,59
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| 3789 |
CC-MAIN-2026-08,3786,19435,2566711179,94820562,30373142,2026-03-17T05:50:32Z,192,0,25,10
|
| 3790 |
CC-MAIN-2026-08,3787,19420,2596365494,93996847,29340119,2026-03-17T07:09:47Z,165,0,20,35
|
|
|
|
| 3807 |
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,179,0,22,41
|
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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-2026-08,3807,19763,2634047912,97023938,30612088,2026-03-17T07:34:02Z,202,0,20,22
|
| 3811 |
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|
| 3812 |
CC-MAIN-2026-08,3809,19668,2678184219,94220964,30501820,2026-03-17T06:53:17Z,131,0,22,40
|
| 3813 |
CC-MAIN-2026-08,3810,19787,2622497429,92580755,30078686,2026-03-17T06:58:02Z,121,0,25,31
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|
|
| 3846 |
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CC-MAIN-2026-08,3851,19497,2608009877,95229414,29892717,2026-03-17T07:34:02Z,162,0,21,22
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CC-MAIN-2026-08,3852,19439,2606300625,99921094,30536511,2026-03-17T06:58:02Z,133,0,36,31
|
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|
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CC-MAIN-2026-08,3854,19415,2580147551,97415893,31764437,2026-03-17T07:04:32Z,121,0,28,54
|
| 3853 |
CC-MAIN-2026-08,3855,19536,2614933792,94440391,30708513,2026-03-17T07:04:32Z,107,0,22,54
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CC-MAIN-2026-08,3856,19469,2539660070,89168307,28402396,2026-03-17T07:36:47Z,110,0,24,0
|
| 3855 |
CC-MAIN-2026-08,3857,19572,2605718759,94764147,30438669,2026-03-17T07:09:47Z,155,0,30,35
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CC-MAIN-2026-08,3858,19557,2611361839,95428677,29726773,2026-03-17T07:13:17Z,117,0,26,30
|
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CC-MAIN-2026-08,3859,19663,2601629835,90661267,29135991,2026-03-17T07:13:17Z,109,0,22,30
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|
|
| 3880 |
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|
| 3881 |
CC-MAIN-2026-08,3888,19618,2608547117,93048561,29627684,2026-03-17T07:27:47Z,106,0,22,5
|
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CC-MAIN-2026-08,3890,19360,2572825048,95051132,29779976,2026-03-17T07:29:47Z,177,0,22,15
|
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CC-MAIN-2026-08,3891,19416,2579000345,92498587,28615014,2026-03-17T07:34:02Z,175,0,21,22
|
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CC-MAIN-2026-08,3892,19421,2554750413,91508510,29167077,2026-03-17T07:36:47Z,137,0,17,0
|
| 3885 |
CC-MAIN-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
|
| 3886 |
CC-MAIN-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
|
| 3887 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
|