Publish shard CC-MAIN-2026-08/00761
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00761.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 **16,
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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) | ~693.
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| HTML extracted (uncompressed) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~35.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.7 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 2.0 TB of uncompressed HTML down to 74.
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End to end: ~693.
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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 50h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 18m 21s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h
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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 **16,563,262 documents across 856 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 856 files of CC-MAIN-2026-08 (16,563,262 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 856 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~693.8 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~35.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.7 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 2.0 TB of uncompressed HTML down to 74.7 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 68.2%.
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End to end: ~693.8 GB of raw gzipped WARCs becomes **23.7 GB of Parquet** — a **96.6% total reduction** — containing 16,563,262 clean markdown documents.
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### Processing Times
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Pipeline timings across 856 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 50h 29m 1s avg 3m 32s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 18m 21s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h 23m 13s avg 47s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 15m 3s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00761.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:6a089aa3d4ae004360104ea19bfd367220e774748a808073a8ae8d5cb0e473d3
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size 29887045
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stats.csv
CHANGED
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@@ -269,7 +269,7 @@ CC-MAIN-2026-08,336,19436,2580771346,97329551,30443713,2026-03-13T18:44:06Z,0,42
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CC-MAIN-2026-08,337,19498,2585693817,94604292,30326633,2026-03-13T18:53:00Z,456,0,119,26
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CC-MAIN-2026-08,338,19353,2529304740,96452087,29944312,2026-03-13T19:01:19Z,0,443,49,20
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CC-MAIN-2026-08,339,19120,2524716337,91482854,28628334,2026-03-13T19:09:41Z,0,427,71,13
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CC-MAIN-2026-08,340,19791,2598516873,95489194,31690779,2026-03-13T19:18:46Z,0,438,82,
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,758,19286,2540562630,92329615,30011805,2026-03-13T18:52:06Z,461,0,83,16
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CC-MAIN-2026-08,759,19351,2589407934,89687505,28775957,2026-03-13T19:01:19Z,545,0,50,20
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CC-MAIN-2026-08,760,19406,2587293077,92215111,29920457,2026-03-13T19:09:41Z,427,0,71,13
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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CC-MAIN-2026-08,337,19498,2585693817,94604292,30326633,2026-03-13T18:53:00Z,456,0,119,26
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CC-MAIN-2026-08,338,19353,2529304740,96452087,29944312,2026-03-13T19:01:19Z,0,443,49,20
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CC-MAIN-2026-08,339,19120,2524716337,91482854,28628334,2026-03-13T19:09:41Z,0,427,71,13
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CC-MAIN-2026-08,340,19791,2598516873,95489194,31690779,2026-03-13T19:18:46Z,0,438,82,60
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,758,19286,2540562630,92329615,30011805,2026-03-13T18:52:06Z,461,0,83,16
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CC-MAIN-2026-08,759,19351,2589407934,89687505,28775957,2026-03-13T19:01:19Z,545,0,50,20
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CC-MAIN-2026-08,760,19406,2587293077,92215111,29920457,2026-03-13T19:09:41Z,427,0,71,13
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CC-MAIN-2026-08,761,19312,2565263834,92599487,29887045,2026-03-13T19:20:20Z,498,0,92,0
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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