Publish 3 shards CC-MAIN-2026-08/03772–03888
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/03772.parquet +3 -0
- data/CC-MAIN-2026-08/03820.parquet +3 -0
- data/CC-MAIN-2026-08/03888.parquet +3 -0
- stats.csv +8 -5
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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| 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) | ~
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| Final Parquet (Zstd level 19) | 194.2 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 612.
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End to end: ~5.8 TB of raw gzipped WARCs becomes **194.2 GB of Parquet** — a **96.7% total reduction** — containing 136,
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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 **136,762,113 documents across 7333 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 7333 files of CC-MAIN-2026-08 (136,762,113 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 7333 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) | ~288.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 194.2 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 612.7 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 **194.2 GB of Parquet** — a **96.7% total reduction** — containing 136,762,113 clean markdown documents.
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### Processing Times
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Pipeline timings across 7333 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 489h 39m 49s avg 4m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h 47m 0s avg 55s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 43h 23m 16s avg 21s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03772.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:0ed0d51baafc68ab29ee89d26f543d123200860393b76fc1835ea6144478d317
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size 29904396
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data/CC-MAIN-2026-08/03820.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:09ec051650596eece3f464b5ad5a14d9547a6797b3d0c4a57fcee92a4d4fbb5f
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size 29531933
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data/CC-MAIN-2026-08/03888.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:bffbe485289fc0a47b61531105e1b4115c0ab79ed323a83fb3524c88de4c663b
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size 29627684
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stats.csv
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@@ -3768,10 +3768,11 @@ CC-MAIN-2026-08,3764,19644,2617458285,97405723,30323209,2026-03-17T07:01:47Z,107
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CC-MAIN-2026-08,3765,19432,2556412890,90651281,28805238,2026-03-17T04:56:17Z,178,0,21,54
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| 3769 |
CC-MAIN-2026-08,3766,19352,2566236222,94248102,29418747,2026-03-17T04:59:47Z,176,0,18,4
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| 3770 |
CC-MAIN-2026-08,3767,19578,2609898329,89688041,29252769,2026-03-17T05:01:47Z,176,0,20,33
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| 3771 |
-
CC-MAIN-2026-08,3768,19580,2549808933,91621008,29106218,2026-03-17T07:23:47Z,116,0,19,
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| 3772 |
CC-MAIN-2026-08,3769,19591,2565641297,96703518,30655076,2026-03-17T05:05:02Z,180,0,22,24
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| 3773 |
CC-MAIN-2026-08,3770,19388,2575122398,95375359,30462380,2026-03-17T05:10:47Z,164,0,24,8
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| 3774 |
CC-MAIN-2026-08,3771,19631,2604525695,91131214,28005821,2026-03-17T05:10:47Z,126,0,23,8
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|
|
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| 3775 |
CC-MAIN-2026-08,3773,19461,2581225276,91836377,28992519,2026-03-17T05:15:47Z,131,0,24,9
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| 3776 |
CC-MAIN-2026-08,3774,19658,2622074615,93869528,29170435,2026-03-17T05:17:47Z,97,0,21,8
|
| 3777 |
CC-MAIN-2026-08,3775,19530,2621416702,92796830,28456262,2026-03-17T05:19:47Z,117,0,26,11
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@@ -3811,11 +3812,12 @@ CC-MAIN-2026-08,3811,19527,2547746607,98518156,31017989,2026-03-17T07:17:02Z,124
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| 3811 |
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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| 3813 |
CC-MAIN-2026-08,3814,19471,2588388404,95609519,29769349,2026-03-17T05:19:47Z,109,0,24,11
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| 3814 |
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CC-MAIN-2026-08,3815,19472,2601882002,92058268,29338902,2026-03-17T07:23:47Z,131,0,22,
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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-2026-08,3817,19499,2591655276,97007832,30270190,2026-03-17T05:27:17Z,96,0,57,10
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| 3817 |
CC-MAIN-2026-08,3818,19739,2670644714,99684024,32757736,2026-03-17T05:29:32Z,114,0,27,38
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| 3818 |
CC-MAIN-2026-08,3819,19441,2544896348,94059379,30085950,2026-03-17T05:31:47Z,131,0,24,29
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|
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| 3819 |
CC-MAIN-2026-08,3821,19345,2557247475,92085134,28980047,2026-03-17T05:38:32Z,226,0,29,14
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CC-MAIN-2026-08,3822,19462,2604747261,94467994,29503584,2026-03-17T05:40:47Z,120,0,24,13
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| 3821 |
CC-MAIN-2026-08,3823,19552,2577501579,94141601,30275867,2026-03-17T05:42:32Z,162,0,24,18
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|
@@ -3867,9 +3869,10 @@ CC-MAIN-2026-08,3879,19374,2580176599,92012020,29158551,2026-03-17T07:20:02Z,99,
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|
| 3867 |
CC-MAIN-2026-08,3881,19659,2660337368,93443290,30080806,2026-03-17T07:20:02Z,174,0,20,25
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| 3868 |
CC-MAIN-2026-08,3882,19444,2601372739,95314737,29542013,2026-03-17T07:20:02Z,200,0,31,25
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CC-MAIN-2026-08,3883,19444,2578529119,91797367,29104111,2026-03-17T07:20:02Z,92,0,20,25
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CC-MAIN-2026-08,3885,19490,2598041142,92499033,28880884,2026-03-17T07:23:47Z,195,0,21,
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CC-MAIN-2026-08,3886,19573,2588278452,96961196,30480525,2026-03-17T07:23:47Z,95,0,19,
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| 3872 |
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CC-MAIN-2026-08,3887,19488,2580251210,92805330,29610039,2026-03-17T07:23:47Z,98,0,18,
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| 3873 |
CC-MAIN-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
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| 3874 |
CC-MAIN-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
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| 3875 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
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|
|
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| 3768 |
CC-MAIN-2026-08,3765,19432,2556412890,90651281,28805238,2026-03-17T04:56:17Z,178,0,21,54
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| 3769 |
CC-MAIN-2026-08,3766,19352,2566236222,94248102,29418747,2026-03-17T04:59:47Z,176,0,18,4
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CC-MAIN-2026-08,3767,19578,2609898329,89688041,29252769,2026-03-17T05:01:47Z,176,0,20,33
|
| 3771 |
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CC-MAIN-2026-08,3768,19580,2549808933,91621008,29106218,2026-03-17T07:23:47Z,116,0,19,29
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| 3772 |
CC-MAIN-2026-08,3769,19591,2565641297,96703518,30655076,2026-03-17T05:05:02Z,180,0,22,24
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CC-MAIN-2026-08,3770,19388,2575122398,95375359,30462380,2026-03-17T05:10:47Z,164,0,24,8
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| 3774 |
CC-MAIN-2026-08,3771,19631,2604525695,91131214,28005821,2026-03-17T05:10:47Z,126,0,23,8
|
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CC-MAIN-2026-08,3772,19624,2634979029,95096599,29904396,2026-03-17T07:27:47Z,113,0,24,0
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CC-MAIN-2026-08,3773,19461,2581225276,91836377,28992519,2026-03-17T05:15:47Z,131,0,24,9
|
| 3777 |
CC-MAIN-2026-08,3774,19658,2622074615,93869528,29170435,2026-03-17T05:17:47Z,97,0,21,8
|
| 3778 |
CC-MAIN-2026-08,3775,19530,2621416702,92796830,28456262,2026-03-17T05:19:47Z,117,0,26,11
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|
|
|
| 3812 |
CC-MAIN-2026-08,3812,19419,2570727708,91280717,29306060,2026-03-17T07:01:47Z,166,0,25,23
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| 3813 |
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CC-MAIN-2026-08,3815,19472,2601882002,92058268,29338902,2026-03-17T07:23:47Z,131,0,22,29
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CC-MAIN-2026-08,3819,19441,2544896348,94059379,30085950,2026-03-17T05:31:47Z,131,0,24,29
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| 3820 |
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CC-MAIN-2026-08,3820,19415,2599650938,94917822,29531933,2026-03-17T07:27:47Z,112,0,25,0
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CC-MAIN-2026-08,3821,19345,2557247475,92085134,28980047,2026-03-17T05:38:32Z,226,0,29,14
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| 3822 |
CC-MAIN-2026-08,3822,19462,2604747261,94467994,29503584,2026-03-17T05:40:47Z,120,0,24,13
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| 3823 |
CC-MAIN-2026-08,3823,19552,2577501579,94141601,30275867,2026-03-17T05:42:32Z,162,0,24,18
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|
| 3869 |
CC-MAIN-2026-08,3881,19659,2660337368,93443290,30080806,2026-03-17T07:20:02Z,174,0,20,25
|
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CC-MAIN-2026-08,3882,19444,2601372739,95314737,29542013,2026-03-17T07:20:02Z,200,0,31,25
|
| 3871 |
CC-MAIN-2026-08,3883,19444,2578529119,91797367,29104111,2026-03-17T07:20:02Z,92,0,20,25
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CC-MAIN-2026-08,3885,19490,2598041142,92499033,28880884,2026-03-17T07:23:47Z,195,0,21,29
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CC-MAIN-2026-08,3886,19573,2588278452,96961196,30480525,2026-03-17T07:23:47Z,95,0,19,29
|
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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,106,0,22,0
|
| 3876 |
CC-MAIN-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
|
| 3877 |
CC-MAIN-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
|
| 3878 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
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