Publish 3 shards CC-MAIN-2026-08/00181–00764
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00181.parquet +3 -0
- data/CC-MAIN-2026-08/00515.parquet +3 -0
- data/CC-MAIN-2026-08/00764.parquet +3 -0
- stats.csv +4 -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 **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) | ~35.
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| Final Parquet (Zstd level 19) | 24.2 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 2.0 TB of uncompressed HTML down to 76.
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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 52h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 20m
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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 **16,932,344 documents across 875 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 875 files of CC-MAIN-2026-08 (16,932,344 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 875 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~709.2 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) | ~35.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.2 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 2.0 TB of uncompressed HTML down to 76.3 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: ~709.2 GB of raw gzipped WARCs becomes **24.2 GB of Parquet** — a **96.6% total reduction** — containing 16,932,344 clean markdown documents.
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### Processing Times
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Pipeline timings across 875 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 52h 43m 41s avg 3m 36s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h 59m 14s avg 49s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 20m 51s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00181.parquet
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data/CC-MAIN-2026-08/00515.parquet
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data/CC-MAIN-2026-08/00764.parquet
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version https://git-lfs.github.com/spec/v1
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size 30252614
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stats.csv
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@@ -181,6 +181,7 @@ CC-MAIN-2026-08,177,19607,2613090732,93217533,29178678,2026-03-13T19:08:26Z,371,
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,180,19223,2568077852,95978263,30620785,2026-03-13T19:37:43Z,665,0,91,31
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