Publish shard CC-MAIN-2026-08/00772
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00772.parquet +3 -0
- stats.csv +1 -0
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 **17,
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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) | ~748.
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| HTML extracted (uncompressed) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~37.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.6 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 2.2 TB of uncompressed HTML down to 80.
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End to end: ~748.
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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 59h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 47m 46s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 39m 16s avg 25s
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```
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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 **17,886,523 documents across 924 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 924 files of CC-MAIN-2026-08 (17,886,523 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 924 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~748.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~37.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.6 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 2.2 TB of uncompressed HTML down to 80.7 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: ~748.9 GB of raw gzipped WARCs becomes **25.6 GB of Parquet** — a **96.6% total reduction** — containing 17,886,523 clean markdown documents.
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### Processing Times
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Pipeline timings across 924 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 59h 24m 19s avg 3m 51s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 47m 46s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h 33m 27s avg 52s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 39m 16s avg 25s
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```
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data/CC-MAIN-2026-08/00772.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:c509f761129134ea3d646c8a1eedc9d7a5d2494db01bd95da2d7daf0cc4b5474
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size 30858542
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stats.csv
CHANGED
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@@ -475,6 +475,7 @@ CC-MAIN-2026-08,768,19501,2615201592,97722261,30560353,2026-03-13T20:33:22Z,739,
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CC-MAIN-2026-08,769,19436,2575617917,92436824,29676466,2026-03-13T20:45:45Z,616,0,111,16
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| 476 |
CC-MAIN-2026-08,770,19550,2591679193,98878610,30913397,2026-03-13T20:59:15Z,582,0,89,28
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| 477 |
CC-MAIN-2026-08,771,19149,2546381668,92769272,29348198,2026-03-13T21:07:54Z,575,0,90,19
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| 478 |
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-2026-08,769,19436,2575617917,92436824,29676466,2026-03-13T20:45:45Z,616,0,111,16
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CC-MAIN-2026-08,770,19550,2591679193,98878610,30913397,2026-03-13T20:59:15Z,582,0,89,28
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| 477 |
CC-MAIN-2026-08,771,19149,2546381668,92769272,29348198,2026-03-13T21:07:54Z,575,0,90,19
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CC-MAIN-2026-08,772,19532,2587698778,95270220,30858542,2026-03-13T21:17:24Z,449,0,101,0
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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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