Publish shard CC-MAIN-2026-08/00758
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00758.parquet +3 -0
- stats.csv +3 -2
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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~34.
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| Final Parquet (Zstd level 19) | 23.
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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 1.9 TB of uncompressed HTML down to 72.
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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 48h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 56m 33s avg 16s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h
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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 **16,174,358 documents across 836 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 836 files of CC-MAIN-2026-08 (16,174,358 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 836 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~677.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~34.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.2 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 1.9 TB of uncompressed HTML down to 72.9 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: ~677.6 GB of raw gzipped WARCs becomes **23.2 GB of Parquet** — a **96.6% total reduction** — containing 16,174,358 clean markdown documents.
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### Processing Times
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Pipeline timings across 836 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 48h 34m 27s avg 3m 29s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 56m 33s avg 16s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h 50m 36s avg 46s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 8m 16s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00758.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:5cc9a19e2c5df76ea20fd62fa466e3194b9341cb63f27c2f8962589af76ddc1d
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size 30011805
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stats.csv
CHANGED
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@@ -175,7 +175,7 @@ CC-MAIN-2026-08,171,19525,2569500927,95427462,30216223,2026-03-13T18:12:18Z,480,
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@@ -500,7 +501,7 @@ CC-MAIN-2026-08,1012,19467,2551049903,95379096,30231686,2026-03-13T18:16:56Z,280
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CC-MAIN-2026-08,174,19430,2594383888,94151433,30292019,2026-03-13T18:41:24Z,426,0,97,25
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CC-MAIN-2026-08,175,19361,2535880308,90825657,29300682,2026-03-13T18:51:11Z,500,0,82,20
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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-2026-08,756,19494,2576683987,96595694,31300764,2026-03-13T18:35:21Z,412,0,136,28
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CC-MAIN-2026-08,757,19539,2604837549,90805230,28789224,2026-03-13T18:43:16Z,369,0,61,27
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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-2026-08,1016,19688,2601213579,96284971,29536751,2026-03-13T18:51:11Z,531,0,79,20
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