Publish shard CC-MAIN-2026-08/00113
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00113.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 **2,
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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) |
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| Packed markdown WARC (.md.warc.gz) | ~4.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.
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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 4h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 49m
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h
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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 **2,371,820 documents across 121 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 121 files of CC-MAIN-2026-08 (2,371,820 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 121 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~98.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 294.2 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~4.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.4 GB | ~2.9 TB | **-31.9%** 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 294.2 GB of uncompressed HTML down to 10.5 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 68.0%.
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End to end: ~98.1 GB of raw gzipped WARCs becomes **3.4 GB of Parquet** — a **96.6% total reduction** — containing 2,371,820 clean markdown documents.
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### Processing Times
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Pipeline timings across 121 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 4h 4m 49s avg 2m 1s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 7s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 49m 44s avg 24s
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 17m 7s avg 38s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00113.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:1f200b5e2ed230da8223864c1051f36404c957f4d798700858a1e7cb95a042e4
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size 30306018
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stats.csv
CHANGED
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@@ -86,7 +86,7 @@ CC-MAIN-2026-08,410,19536,2605916424,93892532,29936094,2026-03-13T07:19:04Z,182,
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CC-MAIN-2026-08,411,19783,2615886385,93522421,30433574,2026-03-13T07:24:19Z,246,0,34,33
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CC-MAIN-2026-08,412,19421,2588662566,94735501,31063646,2026-03-13T07:27:01Z,121,0,25,13
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CC-MAIN-2026-08,413,19245,2557370915,94249339,29958343,2026-03-13T07:30:13Z,144,0,31,15
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CC-MAIN-2026-08,414,19623,2591080218,95450599,29779422,2026-03-13T07:
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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-2026-08,711,19399,2584555709,91747716,28885762,2026-03-13T07:24:08Z,252,0,32,27
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CC-MAIN-2026-08,712,19335,2543065275,92996974,29652529,2026-03-13T07:27:08Z,120,0,24,34
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CC-MAIN-2026-08,713,19481,2607510201,94146081,29995656,2026-03-13T07:30:14Z,111,0,26,48
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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CC-MAIN-2026-08,411,19783,2615886385,93522421,30433574,2026-03-13T07:24:19Z,246,0,34,33
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CC-MAIN-2026-08,412,19421,2588662566,94735501,31063646,2026-03-13T07:27:01Z,121,0,25,13
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CC-MAIN-2026-08,413,19245,2557370915,94249339,29958343,2026-03-13T07:30:13Z,144,0,31,15
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CC-MAIN-2026-08,414,19623,2591080218,95450599,29779422,2026-03-13T07:33:40Z,103,0,22,81
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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-2026-08,711,19399,2584555709,91747716,28885762,2026-03-13T07:24:08Z,252,0,32,27
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CC-MAIN-2026-08,712,19335,2543065275,92996974,29652529,2026-03-13T07:27:08Z,120,0,24,34
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CC-MAIN-2026-08,713,19481,2607510201,94146081,29995656,2026-03-13T07:30:14Z,111,0,26,48
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CC-MAIN-2026-08,714,19423,2596376760,95980683,30740910,2026-03-13T07:33:39Z,181,0,22,0
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:41:39Z,163,0,37,204
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CC-MAIN-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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