Publish shard CC-MAIN-2026-08/00107
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00107.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 **1,
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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) | ~
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~3.
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| Final Parquet (Zstd level 19) | 2.4 GB | ~2.9 TB | **-31.8%** 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
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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 2h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 11s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) █████████░░░░░░░░░░░░░░░ total
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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 **1,690,691 documents across 86 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 86 files of CC-MAIN-2026-08 (1,690,691 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 86 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~69.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 210.1 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~3.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 2.4 GB | ~2.9 TB | **-31.8%** 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 210.1 GB of uncompressed HTML down to 7.4 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 67.9%.
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End to end: ~69.7 GB of raw gzipped WARCs becomes **2.4 GB of Parquet** — a **96.6% total reduction** — containing 1,690,691 clean markdown documents.
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### Processing Times
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Pipeline timings across 86 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 2h 27m 20s avg 1m 42s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 11s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 33m 28s avg 23s
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Publish (HuggingFace) █████████░░░░░░░░░░░░░░░ total 1h 1m 22s avg 42s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00107.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:451c8d59718ffc9c7f76522f632c6fccd1b69492b42b8cf84353a5c0f9a65d5f
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size 30876795
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stats.csv
CHANGED
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@@ -50,13 +50,14 @@ CC-MAIN-2026-08,103,19511,2593312947,96164480,30296223,2026-03-13T06:47:48Z,187,
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CC-MAIN-2026-08,104,19464,2548377519,91323603,28774002,2026-03-13T06:54:05Z,107,0,29,239
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CC-MAIN-2026-08,105,19486,2561400814,94725131,30979352,2026-03-13T07:00:59Z,295,0,42,76
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CC-MAIN-2026-08,106,19330,2553664208,96434475,31127446,2026-03-13T07:06:40Z,245,0,63,30
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,254,19506,2588922978,95342460,30328355,2026-03-13T06:56:10Z,136,0,21,109
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CC-MAIN-2026-08,255,19631,2593650927,99153070,31590444,2026-03-13T07:01:30Z,218,0,26,74
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-
CC-MAIN-2026-08,257,19389,2538319588,91853092,28846793,2026-03-13T07:
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,104,19464,2548377519,91323603,28774002,2026-03-13T06:54:05Z,107,0,29,239
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CC-MAIN-2026-08,105,19486,2561400814,94725131,30979352,2026-03-13T07:00:59Z,295,0,42,76
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CC-MAIN-2026-08,106,19330,2553664208,96434475,31127446,2026-03-13T07:06:40Z,245,0,63,30
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,254,19506,2588922978,95342460,30328355,2026-03-13T06:56:10Z,136,0,21,109
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CC-MAIN-2026-08,255,19631,2593650927,99153070,31590444,2026-03-13T07:01:30Z,218,0,26,74
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CC-MAIN-2026-08,256,19178,2558160132,95394551,29553555,2026-03-13T07:06:35Z,236,0,56,10
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CC-MAIN-2026-08,257,19389,2538319588,91853092,28846793,2026-03-13T07:09:49Z,122,0,19,51
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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