Publish shard CC-MAIN-2026-08/01024
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/01024.parquet +3 -0
- stats.csv +2 -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 **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) | ~714.
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| HTML extracted (uncompressed) | 2.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~36.
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| Final Parquet (Zstd level 19) | 24.4 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 76.9 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: ~714.
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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 53h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 23m
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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 **17,068,799 documents across 882 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 882 files of CC-MAIN-2026-08 (17,068,799 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 882 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~714.9 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) | ~36.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.4 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 76.9 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: ~714.9 GB of raw gzipped WARCs becomes **24.4 GB of Parquet** — a **96.6% total reduction** — containing 17,068,799 clean markdown documents.
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### Processing Times
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Pipeline timings across 882 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 53h 35m 11s avg 3m 38s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h 9m 53s avg 49s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 23m 53s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01024.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:e5792c27546fb4667b30177ac58d1e37016fb35301b33a852d05d27c0c2fbd2c
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size 29327715
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stats.csv
CHANGED
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@@ -339,7 +339,7 @@ CC-MAIN-2026-08,512,19409,2588385924,92008152,29561232,2026-03-13T19:21:41Z,365,
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CC-MAIN-2026-08,513,19243,2532969689,94386245,29438528,2026-03-13T19:27:51Z,337,0,31,28
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CC-MAIN-2026-08,514,19282,2577246804,93966169,29763725,2026-03-13T19:38:27Z,542,0,79,20
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CC-MAIN-2026-08,515,19316,2560287042,96839519,29930731,2026-03-13T19:49:44Z,600,0,77,14
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CC-MAIN-2026-08,516,19528,2607927055,95622899,30793330,2026-03-13T19:59:23Z,469,0,68,
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CC-MAIN-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:42:51Z,280,0,20,176
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CC-MAIN-2026-08,552,19402,2594817630,94092761,30309254,2026-03-13T06:48:30Z,211,0,46,80
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CC-MAIN-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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CC-MAIN-2026-08,1021,19726,2630098078,92943742,29797665,2026-03-13T19:29:26Z,229,0,44,14
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CC-MAIN-2026-08,1022,19484,2581188446,92772433,28977417,2026-03-13T19:40:28Z,529,0,126,13
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CC-MAIN-2026-08,1023,19387,2558953326,93691235,29097353,2026-03-13T19:51:26Z,547,0,109,22
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,515,19316,2560287042,96839519,29930731,2026-03-13T19:49:44Z,600,0,77,14
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CC-MAIN-2026-08,516,19528,2607927055,95622899,30793330,2026-03-13T19:59:23Z,469,0,68,29
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CC-MAIN-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:42:51Z,280,0,20,176
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CC-MAIN-2026-08,552,19402,2594817630,94092761,30309254,2026-03-13T06:48:30Z,211,0,46,80
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CC-MAIN-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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CC-MAIN-2026-08,1021,19726,2630098078,92943742,29797665,2026-03-13T19:29:26Z,229,0,44,14
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CC-MAIN-2026-08,1022,19484,2581188446,92772433,28977417,2026-03-13T19:40:28Z,529,0,126,13
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CC-MAIN-2026-08,1023,19387,2558953326,93691235,29097353,2026-03-13T19:51:26Z,547,0,109,22
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CC-MAIN-2026-08,1024,19726,2605459071,91335886,29327715,2026-03-13T20:00:04Z,383,0,109,0
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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