Publish 3 shards CC-MAIN-2026-08/03780–03857
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/03780.parquet +3 -0
- data/CC-MAIN-2026-08/03787.parquet +3 -0
- data/CC-MAIN-2026-08/03857.parquet +3 -0
- stats.csv +7 -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) | 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 16.4 TB of uncompressed HTML down to 610.
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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 **136,352,203 documents across 7312 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 7312 files of CC-MAIN-2026-08 (136,352,203 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 7312 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) | ~287.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 193.7 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 610.8 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 **193.7 GB of Parquet** — a **96.7% total reduction** — containing 136,352,203 clean markdown documents.
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### Processing Times
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Pipeline timings across 7312 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 488h 56m 11s avg 4m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 27m 50s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 112h 38m 57s avg 55s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 43h 13m 37s avg 21s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/03780.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:cf004ec1077dfe52fa852ec79270b2eb63d1f2d5af0d86189728b5e8a4b3f063
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size 29932495
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data/CC-MAIN-2026-08/03787.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a7d3b5e1f077edc29933103dbe73c135db5136b5a1a856c9fb8ac0ebe2a9c0a8
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size 29340119
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data/CC-MAIN-2026-08/03857.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:3aaa21b4bf287c81e194b20de95cd0afa4aca135640b8584946de303ce2a1bfc
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size 30438669
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stats.csv
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@@ -3775,14 +3775,16 @@ CC-MAIN-2026-08,3773,19461,2581225276,91836377,28992519,2026-03-17T05:15:47Z,131
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CC-MAIN-2026-08,3774,19658,2622074615,93869528,29170435,2026-03-17T05:17:47Z,97,0,21,8
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| 3776 |
CC-MAIN-2026-08,3775,19530,2621416702,92796830,28456262,2026-03-17T05:19:47Z,117,0,26,11
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| 3777 |
CC-MAIN-2026-08,3776,19584,2582885329,95393371,30031363,2026-03-17T05:22:02Z,100,0,28,48
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| 3778 |
-
CC-MAIN-2026-08,3777,19513,2589142734,97489949,30602215,2026-03-17T07:04:32Z,105,0,24,
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CC-MAIN-2026-08,3778,19449,2588087997,94351499,29663502,2026-03-17T05:27:17Z,321,0,21,10
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| 3780 |
CC-MAIN-2026-08,3779,19199,2549960728,93066368,29304842,2026-03-17T05:31:47Z,153,0,29,29
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| 3781 |
CC-MAIN-2026-08,3781,19404,2583276945,90583350,29653081,2026-03-17T05:36:02Z,214,0,41,47
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| 3782 |
CC-MAIN-2026-08,3782,19839,2626486825,92610103,29440267,2026-03-17T05:38:32Z,117,0,31,14
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| 3783 |
CC-MAIN-2026-08,3783,19443,2592219168,94732660,30118327,2026-03-17T05:42:32Z,167,0,26,18
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| 3784 |
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
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| 3786 |
CC-MAIN-2026-08,3788,19288,2559747521,95462111,29805726,2026-03-17T05:55:47Z,107,0,25,6
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CC-MAIN-2026-08,3789,19515,2602087596,93085431,29192463,2026-03-17T06:00:47Z,178,0,24,29
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CC-MAIN-2026-08,3790,19546,2583789466,96603101,31413004,2026-03-17T06:03:47Z,138,0,37,31
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@@ -3835,8 +3837,9 @@ CC-MAIN-2026-08,3849,19521,2572850854,90431918,28652060,2026-03-17T06:53:17Z,128
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| 3835 |
CC-MAIN-2026-08,3850,19505,2586040838,95227686,30295736,2026-03-17T06:58:02Z,97,0,29,31
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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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| 3837 |
CC-MAIN-2026-08,3853,19421,2600785460,95558432,29812564,2026-03-17T07:01:47Z,91,0,25,23
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CC-MAIN-2026-08,3854,19415,2580147551,97415893,31764437,2026-03-17T07:04:32Z,121,0,28,
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CC-MAIN-2026-08,3855,19536,2614933792,94440391,30708513,2026-03-17T07:04:32Z,107,0,22,
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| 3840 |
CC-MAIN-2026-08,3863,19136,2568351093,99368510,32321209,2026-03-17T06:26:02Z,111,0,26,10
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| 3841 |
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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| 3848 |
CC-MAIN-2026-08,3872,19543,2612877676,92754266,29392491,2026-03-17T06:53:17Z,98,0,29,40
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CC-MAIN-2026-08,3873,19612,2593908528,94259805,29231824,2026-03-17T06:53:17Z,93,0,20,40
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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,
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| 3852 |
CC-MAIN-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
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| 3853 |
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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| 3775 |
CC-MAIN-2026-08,3774,19658,2622074615,93869528,29170435,2026-03-17T05:17:47Z,97,0,21,8
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CC-MAIN-2026-08,3775,19530,2621416702,92796830,28456262,2026-03-17T05:19:47Z,117,0,26,11
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CC-MAIN-2026-08,3776,19584,2582885329,95393371,30031363,2026-03-17T05:22:02Z,100,0,28,48
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CC-MAIN-2026-08,3777,19513,2589142734,97489949,30602215,2026-03-17T07:04:32Z,105,0,24,54
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CC-MAIN-2026-08,3778,19449,2588087997,94351499,29663502,2026-03-17T05:27:17Z,321,0,21,10
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CC-MAIN-2026-08,3779,19199,2549960728,93066368,29304842,2026-03-17T05:31:47Z,153,0,29,29
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CC-MAIN-2026-08,3780,19410,2570025021,95259821,29932495,2026-03-17T07:09:47Z,91,0,20,0
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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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| 3785 |
CC-MAIN-2026-08,3785,19376,2576474028,97185069,30961486,2026-03-17T05:46:02Z,167,0,32,59
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CC-MAIN-2026-08,3787,19420,2596365494,93996847,29340119,2026-03-17T07:09:47Z,165,0,20,0
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| 3789 |
CC-MAIN-2026-08,3789,19515,2602087596,93085431,29192463,2026-03-17T06:00:47Z,178,0,24,29
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| 3790 |
CC-MAIN-2026-08,3790,19546,2583789466,96603101,31413004,2026-03-17T06:03:47Z,138,0,37,31
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|
|
| 3837 |
CC-MAIN-2026-08,3850,19505,2586040838,95227686,30295736,2026-03-17T06:58:02Z,97,0,29,31
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CC-MAIN-2026-08,3854,19415,2580147551,97415893,31764437,2026-03-17T07:04:32Z,121,0,28,54
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CC-MAIN-2026-08,3855,19536,2614933792,94440391,30708513,2026-03-17T07:04:32Z,107,0,22,54
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CC-MAIN-2026-08,3857,19572,2605718759,94764147,30438669,2026-03-17T07:09:47Z,155,0,30,0
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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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| 3844 |
CC-MAIN-2026-08,3864,19548,2574110045,95496920,30202016,2026-03-17T06:27:47Z,174,0,20,18
|
| 3845 |
CC-MAIN-2026-08,3865,19410,2544755697,95772161,29378374,2026-03-17T06:33:32Z,196,0,21,10
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| 3851 |
CC-MAIN-2026-08,3872,19543,2612877676,92754266,29392491,2026-03-17T06:53:17Z,98,0,29,40
|
| 3852 |
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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-2026-08,5000,19611,2544147305,91933944,29028493,2026-03-13T17:51:21Z,393,0,122,0
|
| 3856 |
CC-MAIN-2026-08,5001,19479,2584193920,98160035,30333909,2026-03-13T17:51:21Z,240,0,274,0
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| 3857 |
CC-MAIN-2026-08,5002,19469,2581016243,91856903,29042422,2026-03-14T01:06:34Z,622,0,143,18
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