Publish shard CC-MAIN-2026-08/00327
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00327.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 **13,
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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) | ~547.
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| HTML extracted (uncompressed) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~27.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 18.7 GB | ~2.9 TB | **-32.3%** 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 1.6 TB of uncompressed HTML down to 58.9 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: ~547.
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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 31h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 6h
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 5h
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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 **13,087,174 documents across 676 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 676 files of CC-MAIN-2026-08 (13,087,174 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 676 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~547.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~27.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 18.7 GB | ~2.9 TB | **-32.3%** 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 1.6 TB of uncompressed HTML down to 58.9 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: ~547.9 GB of raw gzipped WARCs becomes **18.7 GB of Parquet** — a **96.6% total reduction** — containing 13,087,174 clean markdown documents.
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### Processing Times
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Pipeline timings across 676 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 31h 4m 18s avg 2m 45s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 6h 53m 34s avg 36s
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 5h 28m 26s avg 29s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00327.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a0242d02950a6e5d25f0edb663f97c5aa1df0c9eaac94fb8fba3754bd1e28496
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size 30210344
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stats.csv
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@@ -503,7 +504,7 @@ CC-MAIN-2026-08,1322,19288,2544589204,97716609,30795250,2026-03-13T14:55:27Z,0,0
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