Publish shard CC-MAIN-2026-08/00180
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00180.parquet +3 -0
- stats.csv +1 -0
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) | ~35.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.0 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 75.
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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 51h
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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 18m 29s avg 26s
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```
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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 **16,776,731 documents across 867 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 867 files of CC-MAIN-2026-08 (16,776,731 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 867 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~702.7 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) | ~35.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.0 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 75.6 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: ~702.7 GB of raw gzipped WARCs becomes **24.0 GB of Parquet** — a **96.6% total reduction** — containing 16,776,731 clean markdown documents.
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### Processing Times
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Pipeline timings across 867 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 51h 27m 54s avg 3m 33s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 11h 45m 24s avg 48s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 18m 29s avg 26s
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```
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data/CC-MAIN-2026-08/00180.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:97370b6a0d811f35f5d9b3724e1543eefbee4e07a435a4d8f0574a7a8d957ae0
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size 30620785
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stats.csv
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@@ -180,6 +180,7 @@ CC-MAIN-2026-08,176,19391,2554258489,97225767,30342108,2026-03-13T19:00:26Z,460,
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CC-MAIN-2026-08,177,19607,2613090732,93217533,29178678,2026-03-13T19:08:26Z,371,0,100,10
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CC-MAIN-2026-08,178,19286,2532460299,93571603,29711514,2026-03-13T19:16:45Z,359,0,143,16
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CC-MAIN-2026-08,179,19535,2572390278,90762105,28936482,2026-03-13T19:25:18Z,402,0,98,16
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,177,19607,2613090732,93217533,29178678,2026-03-13T19:08:26Z,371,0,100,10
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CC-MAIN-2026-08,178,19286,2532460299,93571603,29711514,2026-03-13T19:16:45Z,359,0,143,16
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CC-MAIN-2026-08,179,19535,2572390278,90762105,28936482,2026-03-13T19:25:18Z,402,0,98,16
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CC-MAIN-2026-08,180,19223,2568077852,95978263,30620785,2026-03-13T19:37:43Z,665,0,91,0
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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