Publish shard CC-MAIN-2026-08/02583
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/02583.parquet +3 -0
- stats.csv +2 -1
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 **14,
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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) | ~
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| HTML extracted (uncompressed) | 1.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~30.
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| Final Parquet (Zstd level 19) | 20.4 GB | ~2.9 TB | **-32.4%** 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 1.7 TB of uncompressed HTML down to 64.
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End to end: ~
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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 40h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h
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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 **14,227,836 documents across 736 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 736 files of CC-MAIN-2026-08 (14,227,836 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 736 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~596.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.7 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~30.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 20.4 GB | ~2.9 TB | **-32.4%** 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 1.7 TB of uncompressed HTML down to 64.2 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 68.2%.
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End to end: ~596.6 GB of raw gzipped WARCs becomes **20.4 GB of Parquet** — a **96.6% total reduction** — containing 14,227,836 clean markdown documents.
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### Processing Times
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Pipeline timings across 736 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 40h 40m 21s avg 3m 18s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 52m 43s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 31m 12s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02583.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:ebdeb4c644ecafca6d9702023e7e98b11d50b7365535c30155f0441292973435
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size 29805976
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stats.csv
CHANGED
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@@ -686,6 +686,7 @@ CC-MAIN-2026-08,2579,19503,2571715818,94103623,30507743,2026-03-13T15:13:11Z,202
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| 686 |
CC-MAIN-2026-08,2580,19296,2524393224,91578828,29472992,2026-03-13T15:21:56Z,318,0,38,4
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CC-MAIN-2026-08,2582,19563,2556513838,98156888,31148205,2026-03-13T15:37:54Z,617,0,49,9
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CC-MAIN-2026-08,2801,19800,2573332995,93935647,29781057,2026-03-13T12:36:24Z,480,0,24,0
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| 690 |
CC-MAIN-2026-08,2802,19377,2552826046,96926255,30379332,2026-03-13T12:44:04Z,402,0,56,0
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CC-MAIN-2026-08,2810,19479,2567872535,94762671,29742907,2026-03-13T14:03:56Z,0,0,0,4
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@@ -703,7 +704,7 @@ CC-MAIN-2026-08,2821,19725,2635619645,94485743,29377814,2026-03-13T15:21:56Z,448
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CC-MAIN-2026-08,2823,19503,2580429353,97193705,30608986,2026-03-13T15:37:00Z,534,0,96,13
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CC-MAIN-2026-08,2824,19187,2537556792,92083965,29727470,2026-03-13T15:46:33Z,498,0,62,9
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CC-MAIN-2026-08,2825,19533,2582104096,95896575,30321794,2026-03-13T15:52:41Z,305,0,64,12
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-
CC-MAIN-2026-08,2826,19519,2588031935,96747984,30634522,2026-03-13T16:00:26Z,393,0,80,
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CC-MAIN-2026-08,2581,19471,2567634976,95674819,29606440,2026-03-13T15:26:19Z,441,0,39,19
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CC-MAIN-2026-08,2582,19563,2556513838,98156888,31148205,2026-03-13T15:37:54Z,617,0,49,9
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CC-MAIN-2026-08,2583,19288,2578146937,96424818,29805976,2026-03-13T16:00:54Z,1319,0,71,0
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CC-MAIN-2026-08,2801,19800,2573332995,93935647,29781057,2026-03-13T12:36:24Z,480,0,24,0
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CC-MAIN-2026-08,2810,19479,2567872535,94762671,29742907,2026-03-13T14:03:56Z,0,0,0,4
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CC-MAIN-2026-08,2823,19503,2580429353,97193705,30608986,2026-03-13T15:37:00Z,534,0,96,13
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CC-MAIN-2026-08,2824,19187,2537556792,92083965,29727470,2026-03-13T15:46:33Z,498,0,62,9
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CC-MAIN-2026-08,2825,19533,2582104096,95896575,30321794,2026-03-13T15:52:41Z,305,0,64,12
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CC-MAIN-2026-08,2826,19519,2588031935,96747984,30634522,2026-03-13T16:00:26Z,393,0,80,23
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CC-MAIN-2026-08,3051,19591,2590387140,91599959,29213641,2026-03-13T12:27:59Z,0,0,0,5
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CC-MAIN-2026-08,3052,19289,2581535769,95779278,29412368,2026-03-13T12:27:59Z,0,0,0,5
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CC-MAIN-2026-08,3053,19208,2553598556,93105627,29687407,2026-03-13T12:27:59Z,0,0,0,5
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