Publish shard CC-MAIN-2026-08/00705
Browse files- README.md +14 -14
- data/CC-MAIN-2026-08/00705.parquet +3 -0
- stats.csv +6 -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 **1,
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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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~2.
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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: ~
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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 1h
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Convert (HTML → MD) ███
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Export (Parquet) █████
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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 **1,419,426 documents across 72 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 72 files of CC-MAIN-2026-08 (1,419,426 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 72 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~58.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 176.7 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~2.9 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 2.0 GB | ~2.9 TB | **-31.6%** 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 176.7 GB of uncompressed HTML down to 6.2 GB of markdown — a **98.4% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.9%.
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End to end: ~58.4 GB of raw gzipped WARCs becomes **2.0 GB of Parquet** — a **96.6% total reduction** — containing 1,419,426 clean markdown documents.
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### Processing Times
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Pipeline timings across 72 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 1h 45m 43s avg 1m 28s
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Convert (HTML → MD) ███░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 13s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 24m 32s avg 20s
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Publish (HuggingFace) ██████████░░░░░░░░░░░░░░ total 48m 0s avg 40s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00705.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:e7b16e57ecaed09070b5d9a8d38d30a6ad4b9c9a0c8e63b119647efad867bf1b
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size 30384189
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stats.csv
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@@ -41,14 +41,17 @@ CC-MAIN-2026-08,38,19372,2618600358,93097292,29730152,2026-03-13T06:42:06Z,131,0
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