Publish shard CC-MAIN-2026-08/00413
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00413.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 **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.
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| Final Parquet (Zstd level 19) | 3.2 GB | ~2.9 TB | **-31.8%** 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
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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 3h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 8s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 14m
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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 **2,274,057 documents across 116 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 116 files of CC-MAIN-2026-08 (2,274,057 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 116 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~94.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 282.2 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~4.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.2 GB | ~2.9 TB | **-31.8%** 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 282.2 GB of uncompressed HTML down to 10.0 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: ~94.0 GB of raw gzipped WARCs becomes **3.2 GB of Parquet** — a **96.6% total reduction** — containing 2,274,057 clean markdown documents.
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### Processing Times
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Pipeline timings across 116 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 3h 53m 47s avg 2m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 8s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 47m 36s avg 24s
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 14m 41s avg 38s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00413.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:02bd0269a59d2fd951c35076e835688d54643c76a6cf9e40f2e53da2763dc52e
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size 29958343
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stats.csv
CHANGED
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@@ -58,7 +58,7 @@ CC-MAIN-2026-08,108,19400,2604607711,92680586,29321154,2026-03-13T07:15:10Z,157,
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CC-MAIN-2026-08,109,19487,2556703136,91883241,29188577,2026-03-13T07:19:05Z,164,0,26,43
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CC-MAIN-2026-08,110,19345,2585860073,93489029,30521102,2026-03-13T07:23:31Z,221,0,31,11
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CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,0,34,18
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-
CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:
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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-2026-08,410,19536,2605916424,93892532,29936094,2026-03-13T07:19:04Z,182,0,24,37
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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-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:42:51Z,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-2026-08,712,19335,2543065275,92996974,29652529,2026-03-13T07:27:08Z,120,0,24,34
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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-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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CC-MAIN-2026-08,110,19345,2585860073,93489029,30521102,2026-03-13T07:23:31Z,221,0,31,11
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CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,0,34,18
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CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:29:14Z,119,0,27,33
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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-2026-08,410,19536,2605916424,93892532,29936094,2026-03-13T07:19:04Z,182,0,24,37
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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-2026-08,413,19245,2557370915,94249339,29958343,2026-03-13T07:29:57Z,144,0,31,0
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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-2026-08,711,19399,2584555709,91747716,28885762,2026-03-13T07:24:08Z,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-2026-08,713,19481,2607510201,94146081,29995656,2026-03-13T07:29:26Z,111,0,26,0
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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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