Publish 2 shards CC-MAIN-2026-08/00193–00354
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00193.parquet +3 -0
- data/CC-MAIN-2026-08/00354.parquet +3 -0
- stats.csv +2 -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 **18,
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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) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~38.
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| Final Parquet (Zstd level 19) | 26.
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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 2.2 TB of uncompressed HTML down to 82.
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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 61h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 14h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 47m 25s 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 **18,217,437 documents across 941 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 941 files of CC-MAIN-2026-08 (18,217,437 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 941 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~762.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~38.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 26.1 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 2.2 TB of uncompressed HTML down to 82.2 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 68.2%.
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End to end: ~762.7 GB of raw gzipped WARCs becomes **26.1 GB of Parquet** — a **96.6% total reduction** — containing 18,217,437 clean markdown documents.
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### Processing Times
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Pipeline timings across 941 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 61h 43m 26s avg 3m 56s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 8m 6s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 14h 16m 17s avg 54s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 47m 25s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00193.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:f2ad357d4fb28d04a6898b390f9c37b5f9515e357027a2250b15227fafa5db47
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size 30243524
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data/CC-MAIN-2026-08/00354.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:01330155dc16012743e6771ec0aa8926e7dd9c03b4cfe9a4e751a78c2b9b25e4
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size 30529507
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stats.csv
CHANGED
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@@ -193,6 +193,7 @@ CC-MAIN-2026-08,189,19332,2543793720,95695763,30417911,2026-03-13T21:06:56Z,568,
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CC-MAIN-2026-08,190,19346,2567101082,94155671,29866255,2026-03-13T21:16:12Z,437,0,99,21
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CC-MAIN-2026-08,191,19387,2570610546,100901027,30983932,2026-03-13T21:29:14Z,631,0,143,37
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CC-MAIN-2026-08,192,19505,2557456629,92443840,29228248,2026-03-13T21:39:11Z,507,0,105,18
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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-2026-08,351,19601,2571162986,96301161,32049090,2026-03-13T21:15:41Z,0,435,120,24
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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-2026-08,352,19231,2557508135,96230865,30275599,2026-03-13T21:28:41Z,628,0,160,29
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CC-MAIN-2026-08,353,19470,2597274403,94820809,30335173,2026-03-13T21:39:11Z,0,519,105,18
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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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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