Publish 2 shards CC-MAIN-2026-08/00177–01018
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00177.parquet +3 -0
- data/CC-MAIN-2026-08/01018.parquet +3 -0
- stats.csv +2 -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) | ~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 2.0 TB of uncompressed HTML down to 73.
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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 49h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 3m 56s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h
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Publish (HuggingFace) ██
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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 **16,387,925 documents across 847 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 847 files of CC-MAIN-2026-08 (16,387,925 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 847 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~686.5 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) | ~34.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.5 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 73.9 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: ~686.5 GB of raw gzipped WARCs becomes **23.5 GB of Parquet** — a **96.6% total reduction** — containing 16,387,925 clean markdown documents.
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### Processing Times
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Pipeline timings across 847 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 49h 44m 29s avg 3m 31s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 3m 56s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h 8m 57s avg 47s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 11m 40s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00177.parquet
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data/CC-MAIN-2026-08/01018.parquet
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version https://git-lfs.github.com/spec/v1
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size 28541903
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stats.csv
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@@ -177,6 +177,7 @@ CC-MAIN-2026-08,173,19312,2574748357,94840263,30552947,2026-03-13T18:32:57Z,615,
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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-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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