Publish 5 shards CC-MAIN-2026-08/03862–03883
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/03862.parquet +3 -0
- data/CC-MAIN-2026-08/03879.parquet +3 -0
- data/CC-MAIN-2026-08/03881.parquet +3 -0
- data/CC-MAIN-2026-08/03882.parquet +3 -0
- data/CC-MAIN-2026-08/03883.parquet +3 -0
- stats.csv +9 -4
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) | 16.4 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~287.
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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 16.4 TB of uncompressed HTML down to
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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 489h
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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 **136,605,853 documents across 7325 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 7325 files of CC-MAIN-2026-08 (136,605,853 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 7325 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) | 16.4 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~287.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 194.0 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 16.4 TB of uncompressed HTML down to 612.0 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 **194.0 GB of Parquet** — a **96.7% total reduction** — containing 136,605,853 clean markdown documents.
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### Processing Times
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Pipeline timings across 7325 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 489h 23m 43s avg 4m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h 44m 10s avg 55s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 43h 18m 46s avg 21s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03862.parquet
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data/CC-MAIN-2026-08/03879.parquet
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data/CC-MAIN-2026-08/03881.parquet
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version https://git-lfs.github.com/spec/v1
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data/CC-MAIN-2026-08/03882.parquet
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version https://git-lfs.github.com/spec/v1
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data/CC-MAIN-2026-08/03883.parquet
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version https://git-lfs.github.com/spec/v1
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size 29104111
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stats.csv
CHANGED
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@@ -3796,7 +3796,7 @@ CC-MAIN-2026-08,3795,19567,2624344351,93319922,29636319,2026-03-17T06:14:17Z,135
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| 3796 |
CC-MAIN-2026-08,3797,19435,2569662827,92786439,29471434,2026-03-17T06:17:02Z,140,0,19,49
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| 3797 |
CC-MAIN-2026-08,3798,19750,2622974595,94197353,30195469,2026-03-17T06:20:17Z,143,0,33,19
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CC-MAIN-2026-08,3800,19496,2556571272,96368882,29844524,2026-03-17T07:17:02Z,107,0,22,
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| 3800 |
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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| 3806 |
CC-MAIN-2026-08,3808,19431,2583412440,90379755,29174520,2026-03-17T06:49:02Z,177,0,20,53
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CC-MAIN-2026-08,3809,19668,2678184219,94220964,30501820,2026-03-17T06:53:17Z,131,0,22,40
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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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CC-MAIN-2026-08,3811,19527,2547746607,98518156,31017989,2026-03-17T07:17:02Z,124,0,23,
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CC-MAIN-2026-08,3812,19419,2570727708,91280717,29306060,2026-03-17T07:01:47Z,166,0,25,23
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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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| 3812 |
CC-MAIN-2026-08,3814,19471,2588388404,95609519,29769349,2026-03-17T05:19:47Z,109,0,24,11
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| 3845 |
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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| 3848 |
-
CC-MAIN-2026-08,3860,19461,2604125434,94307088,30219414,2026-03-17T07:17:02Z,128,0,26,
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|
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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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| 3851 |
CC-MAIN-2026-08,3865,19410,2544755697,95772161,29378374,2026-03-17T06:33:32Z,196,0,21,10
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CC-MAIN-2026-08,3874,19566,2580367381,96080330,30149239,2026-03-17T06:58:03Z,107,0,22,31
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CC-MAIN-2026-08,3876,19600,2603702619,90688335,28842750,2026-03-17T07:04:32Z,149,0,24,54
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CC-MAIN-2026-08,3877,19448,2601114463,97843372,30394814,2026-03-17T07:13:17Z,100,0,31,30
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| 3862 |
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CC-MAIN-2026-08,3878,19284,2577180857,95961468,29580072,2026-03-17T07:17:02Z,113,0,24,
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| 3863 |
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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|
| 3796 |
CC-MAIN-2026-08,3797,19435,2569662827,92786439,29471434,2026-03-17T06:17:02Z,140,0,19,49
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CC-MAIN-2026-08,3798,19750,2622974595,94197353,30195469,2026-03-17T06:20:17Z,143,0,33,19
|
| 3798 |
CC-MAIN-2026-08,3799,19536,2592850263,90443052,29198679,2026-03-17T06:22:47Z,131,0,19,51
|
| 3799 |
+
CC-MAIN-2026-08,3800,19496,2556571272,96368882,29844524,2026-03-17T07:17:02Z,107,0,22,21
|
| 3800 |
CC-MAIN-2026-08,3801,19464,2568550823,93428326,29330613,2026-03-17T06:27:47Z,199,0,18,18
|
| 3801 |
CC-MAIN-2026-08,3802,19433,2561919601,96165099,30523725,2026-03-17T06:30:47Z,175,0,23,36
|
| 3802 |
CC-MAIN-2026-08,3803,19782,2629539758,97207170,30244499,2026-03-17T06:35:17Z,198,0,24,45
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|
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| 3806 |
CC-MAIN-2026-08,3808,19431,2583412440,90379755,29174520,2026-03-17T06:49:02Z,177,0,20,53
|
| 3807 |
CC-MAIN-2026-08,3809,19668,2678184219,94220964,30501820,2026-03-17T06:53:17Z,131,0,22,40
|
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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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CC-MAIN-2026-08,3811,19527,2547746607,98518156,31017989,2026-03-17T07:17:02Z,124,0,23,21
|
| 3810 |
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|
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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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|
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| 3845 |
CC-MAIN-2026-08,3857,19572,2605718759,94764147,30438669,2026-03-17T07:09:47Z,155,0,30,35
|
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|
| 3847 |
CC-MAIN-2026-08,3859,19663,2601629835,90661267,29135991,2026-03-17T07:13:17Z,109,0,22,30
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CC-MAIN-2026-08,3860,19461,2604125434,94307088,30219414,2026-03-17T07:17:02Z,128,0,26,21
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CC-MAIN-2026-08,3862,19560,2592119723,95290257,29690606,2026-03-17T07:20:02Z,157,0,21,0
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CC-MAIN-2026-08,3863,19136,2568351093,99368510,32321209,2026-03-17T06:26:02Z,111,0,26,10
|
| 3851 |
CC-MAIN-2026-08,3864,19548,2574110045,95496920,30202016,2026-03-17T06:27:47Z,174,0,20,18
|
| 3852 |
CC-MAIN-2026-08,3865,19410,2544755697,95772161,29378374,2026-03-17T06:33:32Z,196,0,21,10
|
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|
|
| 3860 |
CC-MAIN-2026-08,3874,19566,2580367381,96080330,30149239,2026-03-17T06:58:03Z,107,0,22,31
|
| 3861 |
CC-MAIN-2026-08,3876,19600,2603702619,90688335,28842750,2026-03-17T07:04:32Z,149,0,24,54
|
| 3862 |
CC-MAIN-2026-08,3877,19448,2601114463,97843372,30394814,2026-03-17T07:13:17Z,100,0,31,30
|
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CC-MAIN-2026-08,3878,19284,2577180857,95961468,29580072,2026-03-17T07:17:02Z,113,0,24,21
|
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CC-MAIN-2026-08,3879,19374,2580176599,92012020,29158551,2026-03-17T07:20:02Z,99,0,24,0
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CC-MAIN-2026-08,3881,19659,2660337368,93443290,30080806,2026-03-17T07:20:02Z,174,0,20,0
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CC-MAIN-2026-08,3882,19444,2601372739,95314737,29542013,2026-03-17T07:20:02Z,200,0,31,0
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CC-MAIN-2026-08,3883,19444,2578529119,91797367,29104111,2026-03-17T07:20:02Z,92,0,20,0
|
| 3868 |
CC-MAIN-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
|
| 3869 |
CC-MAIN-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
|
| 3870 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
|