Publish shard CC-MAIN-2026-08/00096
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00096.parquet +3 -0
- stats.csv +3 -2
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 **15,
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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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~32.
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| Final Parquet (Zstd level 19) | 22.1 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 1.9 TB of uncompressed HTML down to 69.
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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 45h 29m 47s avg 3m 25s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 2h
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h
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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 **15,415,909 documents across 797 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 797 files of CC-MAIN-2026-08 (15,415,909 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 797 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~646.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~32.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 22.1 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 1.9 TB of uncompressed HTML down to 69.5 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: ~646.0 GB of raw gzipped WARCs becomes **22.1 GB of Parquet** — a **96.6% total reduction** — containing 15,415,909 clean markdown documents.
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### Processing Times
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Pipeline timings across 797 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 45h 29m 47s avg 3m 25s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 2h 21m 9s avg 10s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 48m 46s avg 44s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 28s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00096.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:39344385b7ab71f5808bedfa6c52eca4b0e7f14527ba1aa29cfc25396c57d29a
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size 30775465
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stats.csv
CHANGED
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@@ -96,6 +96,7 @@ CC-MAIN-2026-08,92,19520,2560251413,93812697,29804536,2026-03-13T15:14:30Z,343,0
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CC-MAIN-2026-08,93,19565,2625905695,97305588,30010782,2026-03-13T15:22:02Z,271,0,86,42
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CC-MAIN-2026-08,98,19449,2589117299,98909003,31451722,2026-03-13T15:43:46Z,345,0,33,0
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CC-MAIN-2026-08,99,19479,2575024379,92544874,29917329,2026-03-13T15:48:21Z,227,0,28,0
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CC-MAIN-2026-08,100,19468,2560323629,93642547,30026373,2026-03-13T15:51:46Z,201,0,28,0
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CC-MAIN-2026-08,502,19517,2581863236,92435616,29177803,2026-03-13T17:51:21Z,0,408,78,
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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-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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@@ -468,7 +469,7 @@ CC-MAIN-2026-08,1005,19447,2562067418,92075537,29388448,2026-03-13T11:56:02Z,313
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CC-MAIN-2026-08,95,19394,2589724753,96639975,30624565,2026-03-13T17:48:32Z,0,384,114,14
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CC-MAIN-2026-08,500,19181,2553899338,90002434,29044547,2026-03-13T17:41:45Z,450,0,61,35
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CC-MAIN-2026-08,501,19446,2575344077,97014418,30587925,2026-03-13T17:42:47Z,0,0,86,19
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CC-MAIN-2026-08,1009,19530,2619746834,96484617,29637630,2026-03-13T17:51:21Z,421,0,87,24
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