Publish shard CC-MAIN-2026-08/00187
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00187.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 **17,
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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) | 2.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~37.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.1 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 2.1 TB of uncompressed HTML down to
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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 56h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 31m 51s avg
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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 **17,517,487 documents across 905 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 905 files of CC-MAIN-2026-08 (17,517,487 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 905 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~733.5 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~37.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.1 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 2.1 TB of uncompressed HTML down to 79.0 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: ~733.5 GB of raw gzipped WARCs becomes **25.1 GB of Parquet** — a **96.6% total reduction** — containing 17,517,487 clean markdown documents.
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### Processing Times
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Pipeline timings across 905 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 56h 50m 19s avg 3m 46s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h 56m 0s avg 51s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 31m 51s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00187.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:c506d618b87f8ed667ad35482ad76d5c6e11f1e46f659187a9c24f29ff86e6b3
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size 29672417
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stats.csv
CHANGED
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@@ -187,6 +187,7 @@ CC-MAIN-2026-08,183,19463,2529720457,94276231,30210892,2026-03-13T20:05:50Z,260,
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CC-MAIN-2026-08,184,19692,2635707356,94818222,30367577,2026-03-13T20:15:56Z,412,0,185,18
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CC-MAIN-2026-08,185,19612,2555584645,93165351,29462733,2026-03-13T20:21:20Z,266,0,53,35
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CC-MAIN-2026-08,186,19562,2605026344,94016540,29322153,2026-03-13T20:34:44Z,618,0,141,18
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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-2026-08,184,19692,2635707356,94818222,30367577,2026-03-13T20:15:56Z,412,0,185,18
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CC-MAIN-2026-08,185,19612,2555584645,93165351,29462733,2026-03-13T20:21:20Z,266,0,53,35
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CC-MAIN-2026-08,186,19562,2605026344,94016540,29322153,2026-03-13T20:34:44Z,618,0,141,18
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CC-MAIN-2026-08,187,19432,2552788198,93799833,29672417,2026-03-13T20:45:10Z,585,0,92,0
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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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