Publish 2 shards CC-MAIN-2026-08/00250–00501
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00250.parquet +3 -0
- data/CC-MAIN-2026-08/00501.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 **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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| Raw WARC (.warc.gz, downloaded) | ~
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~32.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.
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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 1.8 TB of uncompressed HTML down to 68.
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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 44h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 56m 12s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 52m
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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 **15,260,630 documents across 789 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 789 files of CC-MAIN-2026-08 (15,260,630 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 789 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~639.5 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~32.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.9 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 1.8 TB of uncompressed HTML down to 68.8 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: ~639.5 GB of raw gzipped WARCs becomes **21.9 GB of Parquet** — a **96.6% total reduction** — containing 15,260,630 clean markdown documents.
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### Processing Times
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Pipeline timings across 789 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 44h 59m 5s avg 3m 25s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 56m 12s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 35m 6s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 52m 56s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00250.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:3c31f6f58979be472cd210749c387557470164a0a7f78637a77e30978a94d570
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size 30214413
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data/CC-MAIN-2026-08/00501.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:2ba88d3f954f6776a21db9781362688e49f32079d53e1f08c00bd99ba512fefb
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size 30587925
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stats.csv
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@@ -168,6 +168,7 @@ CC-MAIN-2026-08,167,19479,2608667162,97765916,30323458,2026-03-13T16:28:01Z,199,
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CC-MAIN-2026-08,168,19507,2562143602,99496569,32117485,2026-03-13T16:31:16Z,150,0,46,63
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CC-MAIN-2026-08,169,19473,2563389563,95532787,31173231,2026-03-13T16:34:31Z,153,0,41,15
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CC-MAIN-2026-08,170,19524,2590221583,98934338,32004895,2026-03-13T16:37:46Z,149,0,44,0
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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-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,443,19553,2587209757,94512484,30002040,2026-03-13T11:50:47Z,201,0,23,9
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CC-MAIN-2026-08,444,19453,2585282689,92410463,29786420,2026-03-13T11:56:12Z,297,0,27,9
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CC-MAIN-2026-08,500,19181,2553899338,90002434,29044547,2026-03-13T17:41:45Z,450,0,61,
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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,0,0,86,0
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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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