Publish shard CC-MAIN-2026-08/00031
Browse files- README.md +12 -12
- charts/compression_pie.png +0 -0
- charts/rows_chart.png +0 -0
- charts/size_chart.png +0 -0
- charts/timing_chart.png +0 -0
- data/CC-MAIN-2026-08/00031.parquet +3 -0
- stats.csv +2 -1
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 **
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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) | ~25.
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~1.2 GB | ~3.7 TB | **-98.5%** vs HTML |
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| Final Parquet (Zstd level 19) |
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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
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End to end: ~25.
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### Processing Times
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Pipeline timings across
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```
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Pack (download + HTML→MD) ████████████████████████ total
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Export (Parquet) █████
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Publish (HuggingFace) ███████
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```
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### Personal and Sensitive Information
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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 **640,760 documents across 32 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 32 files of CC-MAIN-2026-08 (640,760 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 32 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~25.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 80.7 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~1.2 GB | ~3.7 TB | **-98.5%** vs HTML |
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| Final Parquet (Zstd level 19) | 881.6 MB | ~2.9 TB | **-31.0%** 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 80.7 GB of uncompressed HTML down to 2.7 GB of markdown — a **98.5% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.6%.
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End to end: ~25.9 GB of raw gzipped WARCs becomes **881.6 MB of Parquet** — a **96.7% total reduction** — containing 640,760 clean markdown documents.
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### Processing Times
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Pipeline timings across 32 shards of CC-MAIN-2026-08:
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```
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Pack (download + HTML→MD) ████████████████████████ total 7m 56s avg 14s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 1m 58s avg 3s
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 2m 26s avg 4s
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```
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### Personal and Sensitive Information
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charts/compression_pie.png
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charts/rows_chart.png
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charts/size_chart.png
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charts/timing_chart.png
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data/CC-MAIN-2026-08/00031.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:3c61db3186c5a02b1c2eac0f8a5e434e8b9cfbb809f9aca8d21af088d52b11cb
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size 28962255
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stats.csv
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CC-MAIN-2026-08,27,19612,2596439798,93518836,30208089,2026-03-13T05:52:18Z,71,18,2
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CC-MAIN-2026-08,28,19560,2579397903,97788121,30727702,2026-03-13T05:53:55Z,71,17,4
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CC-MAIN-2026-08,29,19439,2588405263,93704600,29839666,2026-03-13T05:55:32Z,72,17,2
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CC-MAIN-2026-08,30,19433,2598632809,94875082,30012372,2026-03-13T05:57:
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CC-MAIN-2026-08,27,19612,2596439798,93518836,30208089,2026-03-13T05:52:18Z,71,18,2
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CC-MAIN-2026-08,28,19560,2579397903,97788121,30727702,2026-03-13T05:53:55Z,71,17,4
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CC-MAIN-2026-08,29,19439,2588405263,93704600,29839666,2026-03-13T05:55:32Z,72,17,2
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CC-MAIN-2026-08,30,19433,2598632809,94875082,30012372,2026-03-13T05:57:10Z,72,18,2
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CC-MAIN-2026-08,31,19468,2618291405,91912204,28962255,2026-03-13T05:58:42Z,75,16,0
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