Publish shard CC-MAIN-2026-08/00422
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00422.parquet +3 -0
- stats.csv +3 -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 **3,
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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) |
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| Packed markdown WARC (.md.warc.gz) | ~7.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 5.
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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 6h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h
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Publish (HuggingFace) ███████████░░░░░░░░░░░░░ total 3h 0m
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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 **3,788,059 documents across 194 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 194 files of CC-MAIN-2026-08 (3,788,059 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 194 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~157.2 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 468.9 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~7.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 5.4 GB | ~2.9 TB | **-32.1%** 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 468.9 GB of uncompressed HTML down to 16.9 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 68.1%.
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End to end: ~157.2 GB of raw gzipped WARCs becomes **5.4 GB of Parquet** — a **96.6% total reduction** — containing 3,788,059 clean markdown documents.
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### Processing Times
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Pipeline timings across 194 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 6h 24m 17s avg 1m 58s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 4s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h 18m 29s avg 24s
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Publish (HuggingFace) ███████████░░░░░░░░░░░░░ total 3h 0m 42s avg 55s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00422.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:06cf6d28a391c62651588ace770d806e433bce058c69a8d92282f01ce2166c50
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size 28929921
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stats.csv
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@@ -113,7 +113,7 @@ CC-MAIN-2026-08,280,19648,2618355119,95881188,30182638,2026-03-13T08:23:20Z,154,
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CC-MAIN-2026-08,281,19416,2587645863,94698501,30673039,2026-03-13T08:26:40Z,136,0,23,38
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CC-MAIN-2026-08,282,19425,2542414332,94704569,29892625,2026-03-13T08:28:42Z,87,0,21,11
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CC-MAIN-2026-08,283,19405,2575019840,93976705,30759536,2026-03-13T08:32:01Z,147,0,26,25
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CC-MAIN-2026-08,284,19238,2531057319,96819690,32221564,2026-03-13T08:34:
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,419,19194,2561603300,96400023,29675491,2026-03-13T08:27:11Z,177,0,21,65
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CC-MAIN-2026-08,420,19249,2536627915,90222165,28412577,2026-03-13T08:29:34Z,86,0,19,37
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CC-MAIN-2026-08,421,19425,2579210908,95275597,30546957,2026-03-13T08:32:40Z,126,0,23,35
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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-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,419,19194,2561603300,96400023,29675491,2026-03-13T08:27:11Z,177,0,21,65
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CC-MAIN-2026-08,421,19425,2579210908,95275597,30546957,2026-03-13T08:32:40Z,126,0,23,35
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CC-MAIN-2026-08,422,19427,2555156689,91998757,28929921,2026-03-13T08:34:53Z,110,0,22,0
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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-2026-08,879,19553,2569444239,95701279,30858541,2026-03-13T08:28:36Z,88,0,23,43
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CC-MAIN-2026-08,880,19493,2562178225,98671696,30493564,2026-03-13T08:32:06Z,154,0,26,28
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CC-MAIN-2026-08,881,19336,2555937495,93001627,29739925,2026-03-13T08:34:51Z,143,0,21,0
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