Publish shard CC-MAIN-2026-08/00182
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00182.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 **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) | ~
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| HTML extracted (uncompressed) | 2.0 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~36.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.3 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 76.
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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
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 22m 8s avg 26s
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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 **16,990,417 documents across 878 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 878 files of CC-MAIN-2026-08 (16,990,417 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 878 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~711.7 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) | ~36.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.3 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 76.6 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: ~711.7 GB of raw gzipped WARCs becomes **24.3 GB of Parquet** — a **96.6% total reduction** — containing 16,990,417 clean markdown documents.
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### Processing Times
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Pipeline timings across 878 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 53h 5m 26s avg 3m 37s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h 4m 59s avg 49s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 22m 8s avg 26s
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```
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data/CC-MAIN-2026-08/00182.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a9033ad810e6029d5870d946b3e65d26fe7fa8068f91dc2e4e6c8b0f2b4295c4
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size 29570041
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stats.csv
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@@ -182,6 +182,7 @@ CC-MAIN-2026-08,178,19286,2532460299,93571603,29711514,2026-03-13T19:16:45Z,359,
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CC-MAIN-2026-08,179,19535,2572390278,90762105,28936482,2026-03-13T19:25:18Z,402,0,98,16
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CC-MAIN-2026-08,180,19223,2568077852,95978263,30620785,2026-03-13T19:37:43Z,665,0,91,31
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CC-MAIN-2026-08,181,19602,2644396219,99655105,31173325,2026-03-13T19:49:44Z,604,0,75,14
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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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-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,179,19535,2572390278,90762105,28936482,2026-03-13T19:25:18Z,402,0,98,16
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CC-MAIN-2026-08,180,19223,2568077852,95978263,30620785,2026-03-13T19:37:43Z,665,0,91,31
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CC-MAIN-2026-08,181,19602,2644396219,99655105,31173325,2026-03-13T19:49:44Z,604,0,75,14
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CC-MAIN-2026-08,182,19348,2589082717,92071819,29570041,2026-03-13T19:57:41Z,435,0,81,0
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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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-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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