Publish shard CC-MAIN-2026-08/00708
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00708.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 **1,
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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) | ~3.
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| Final Parquet (Zstd level 19) | 2.4 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 2h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 34m
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Publish (HuggingFace) █████████░░░░░░░░░░░░░░░ total 1h 1m
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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 **1,729,744 documents across 88 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 88 files of CC-MAIN-2026-08 (1,729,744 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 88 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~71.3 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 214.9 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~3.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 2.4 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 214.9 GB of uncompressed HTML down to 7.6 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 67.9%.
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End to end: ~71.3 GB of raw gzipped WARCs becomes **2.4 GB of Parquet** — a **96.6% total reduction** — containing 1,729,744 clean markdown documents.
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### Processing Times
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Pipeline timings across 88 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 2h 33m 3s avg 1m 44s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 10s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 34m 49s avg 23s
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Publish (HuggingFace) █████████░░░░░░░░░░░░░░░ total 1h 1m 58s avg 42s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00708.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:48133fdcabd1c780a407cbbb4edf483ace68c2b1227b2064afcf926cf3039bd9
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size 31074449
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stats.csv
CHANGED
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@@ -65,7 +65,7 @@ CC-MAIN-2026-08,404,19609,2626946886,98313227,30726076,2026-03-13T06:54:14Z,177,
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CC-MAIN-2026-08,405,19695,2604046349,94276542,30825630,2026-03-13T06:59:16Z,213,0,76,11
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CC-MAIN-2026-08,406,19388,2570935771,94074831,28840885,2026-03-13T07:02:52Z,129,0,22,63
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CC-MAIN-2026-08,407,19372,2534947391,92835030,28621715,2026-03-13T07:07:13Z,205,0,36,18
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-
CC-MAIN-2026-08,408,19676,2612284313,96122179,30514192,2026-03-13T07:11:
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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-2026-08,705,19277,2573390297,95712597,30384189,2026-03-13T07:00:33Z,230,0,38,46
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CC-MAIN-2026-08,706,19534,2546671080,95727573,30856975,2026-03-13T07:04:08Z,136,0,62,14
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CC-MAIN-2026-08,707,19636,2585899623,94320766,29804297,2026-03-13T07:08:44Z,177,0,31,66
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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-2026-08,405,19695,2604046349,94276542,30825630,2026-03-13T06:59:16Z,213,0,76,11
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CC-MAIN-2026-08,406,19388,2570935771,94074831,28840885,2026-03-13T07:02:52Z,129,0,22,63
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CC-MAIN-2026-08,407,19372,2534947391,92835030,28621715,2026-03-13T07:07:13Z,205,0,36,18
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CC-MAIN-2026-08,408,19676,2612284313,96122179,30514192,2026-03-13T07:11:14Z,200,0,32,7
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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-2026-08,705,19277,2573390297,95712597,30384189,2026-03-13T07:00:33Z,230,0,38,46
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CC-MAIN-2026-08,706,19534,2546671080,95727573,30856975,2026-03-13T07:04:08Z,136,0,62,14
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CC-MAIN-2026-08,707,19636,2585899623,94320766,29804297,2026-03-13T07:08:44Z,177,0,31,66
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CC-MAIN-2026-08,708,19377,2578205107,96371988,31074449,2026-03-13T07:11:57Z,143,0,49,0
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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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