Publish shard CC-MAIN-2026-08/00707
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00707.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 **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) | ~3.
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| Final Parquet (Zstd level 19) | 2.
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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 2h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 11s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total
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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 **1,651,825 documents across 84 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 84 files of CC-MAIN-2026-08 (1,651,825 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 84 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~68.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 205.3 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~3.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 2.3 GB | ~2.9 TB | **-31.8%** 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 205.3 GB of uncompressed HTML down to 7.2 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 67.9%.
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End to end: ~68.1 GB of raw gzipped WARCs becomes **2.3 GB of Parquet** — a **96.6% total reduction** — containing 1,651,825 clean markdown documents.
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### Processing Times
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Pipeline timings across 84 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 2h 21m 55s avg 1m 41s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 11s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 32m 35s avg 23s
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Publish (HuggingFace) █████████░░░░░░░░░░░░░░░ total 58m 15s avg 41s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00707.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:fdeaec3be65a1760b06d6a54338fe9be21ad5daf741b1d30283d3f41b8dd1646
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size 29804297
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stats.csv
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@@ -43,6 +43,7 @@ CC-MAIN-2026-08,40,19414,2578370274,95334003,30943686,2026-03-13T06:51:10Z,137,0
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CC-MAIN-2026-08,44,19268,2543453471,92880103,29438620,2026-03-13T07:08:35Z,132,0,25,0
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CC-MAIN-2026-08,102,19438,2568537422,97402434,31137610,2026-03-13T06:42:52Z,93,0,20,52
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