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Publish shard CC-MAIN-2026-08/00002

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README.md CHANGED
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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 **290,854 documents across 14 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 14 files of CC-MAIN-2026-08 (290,854 pages total), projected to the full crawl of 100,000 WARC files.
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- | Stage | 14 files (measured) | 100,000 files (projected) | Reduction |
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  |---|---|---|---|
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- | Raw WARC (.warc.gz, downloaded) | ~11.3 GB | ~83 TB | — |
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- | HTML extracted (uncompressed) | 37.4 GB | ~295 TB | — |
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- | Packed markdown WARC (.md.warc.gz) | ~520.3 MB | ~3.7 TB | **-98.6%** vs HTML |
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- | Final Parquet (Zstd level 19) | 365.4 MB | ~2.9 TB | **-29.8%** 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 37.4 GB of uncompressed HTML down to 1.1 GB of markdown — a **98.6% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.0%.
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- End to end: ~11.3 GB of raw gzipped WARCs becomes **365.4 MB of Parquet** — a **96.9% total reduction** — containing 290,854 clean markdown documents.
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  ### Processing Times
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- Pipeline timings across 14 shards of CC-MAIN-2026-08:
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  ```
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  Pack (download + HTML→MD) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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  Export (Parquet) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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- Publish (HuggingFace) ░░░░░░░░░░░░░░░░░░░░░░░░ total 23s avg 1s
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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 **310,330 documents across 15 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 15 files of CC-MAIN-2026-08 (310,330 pages total), projected to the full crawl of 100,000 WARC files.
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+ | Stage | 15 files (measured) | 100,000 files (projected) | Reduction |
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  |---|---|---|---|
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+ | Raw WARC (.warc.gz, downloaded) | ~12.2 GB | ~83 TB | — |
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+ | HTML extracted (uncompressed) | 39.8 GB | ~295 TB | — |
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+ | Packed markdown WARC (.md.warc.gz) | ~562.2 MB | ~3.7 TB | **-98.6%** vs HTML |
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+ | Final Parquet (Zstd level 19) | 394.2 MB | ~2.9 TB | **-29.9%** 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 39.8 GB of uncompressed HTML down to 1.2 GB of markdown — a **98.6% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.0%.
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+ End to end: ~12.2 GB of raw gzipped WARCs becomes **394.2 MB of Parquet** — a **96.8% total reduction** — containing 310,330 clean markdown documents.
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  ### Processing Times
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+ Pipeline timings across 15 shards of CC-MAIN-2026-08:
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  ```
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  Pack (download + HTML→MD) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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  Export (Parquet) ░░░░░░░░░░░░░░░░░░░░░░░░ total — avg —
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+ Publish (HuggingFace) ░░░░░░░░░░░░░░░░░░░░░░░░ total 26s avg 1s
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  ```
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  ### Personal and Sensitive Information
charts/rows_chart.png CHANGED
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charts/timing_chart.png CHANGED
data/CC-MAIN-2026-08/00002.parquet CHANGED
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stats.csv CHANGED
@@ -12,4 +12,5 @@ CC-MAIN-2026-08,9,21131,2910850749,77004269,25960419,,0,0,0
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  CC-MAIN-2026-08,10,21044,2933010991,80544092,26785860,,0,0,0
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  CC-MAIN-2026-08,11,21500,3018399621,82011226,27131705,2026-03-13T05:45:39Z,0,0,5
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  CC-MAIN-2026-08,12,19385,2581304754,93043029,29388150,2026-03-13T05:45:48Z,0,0,6
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- CC-MAIN-2026-08,13,19247,2567985839,94464633,30207204,2026-03-13T05:45:48Z,0,0,0
 
 
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  CC-MAIN-2026-08,10,21044,2933010991,80544092,26785860,,0,0,0
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  CC-MAIN-2026-08,11,21500,3018399621,82011226,27131705,2026-03-13T05:45:39Z,0,0,5
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  CC-MAIN-2026-08,12,19385,2581304754,93043029,29388150,2026-03-13T05:45:48Z,0,0,6
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+ CC-MAIN-2026-08,13,19247,2567985839,94464633,30207204,2026-03-13T05:45:55Z,0,0,3
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+ CC-MAIN-2026-08,14,19476,2599198052,93462608,30191956,2026-03-13T05:45:55Z,0,0,0