Publish shard CC-MAIN-2026-08/00793
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00793.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 **21,
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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) | 2.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~46.
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| Final Parquet (Zstd level 19) | 31.4 GB | ~2.9 TB | **-32.5%** 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 2.6 TB of uncompressed HTML down to 98.
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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 85h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 21m
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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 **21,922,413 documents across 1135 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 1135 files of CC-MAIN-2026-08 (21,922,413 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1135 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~920.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~46.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 31.4 GB | ~2.9 TB | **-32.5%** 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 2.6 TB of uncompressed HTML down to 98.9 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 68.3%.
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End to end: ~920.0 GB of raw gzipped WARCs becomes **31.4 GB of Parquet** — a **96.6% total reduction** — containing 21,922,413 clean markdown documents.
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### Processing Times
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Pipeline timings across 1135 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 85h 54m 39s avg 4m 32s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h 43m 3s avg 1m 5s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 21m 51s avg 23s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00793.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:cfa47f43a10adcbf7c138cdfd670e0ce14887ea97a6c3798b3c133cce386acba
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size 29938743
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stats.csv
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@@ -425,7 +425,7 @@ CC-MAIN-2026-08,541,19435,2582602988,93523616,29414799,2026-03-14T01:06:44Z,641,
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CC-MAIN-2026-08,542,19351,2560617708,92355960,30277476,2026-03-14T01:06:45Z,553,0,151,5
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CC-MAIN-2026-08,543,19172,2514463308,91582405,28716032,2026-03-14T01:13:22Z,726,0,58,35
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CC-MAIN-2026-08,544,19412,2552906080,94266195,30643219,2026-03-14T01:22:32Z,497,0,27,25
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CC-MAIN-2026-08,545,19432,2577257018,97337811,30840334,2026-03-14T01:29:50Z,378,0,85,
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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-2026-08,790,19525,2564974109,93745695,29844446,2026-03-14T01:06:45Z,771,0,72,5
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CC-MAIN-2026-08,791,19549,2595677953,94842727,29594346,2026-03-14T01:12:35Z,654,0,209,9
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CC-MAIN-2026-08,792,10720,1240933387,57370777,17474176,2026-03-14T01:23:01Z,0,0,23,13
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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-2026-08,542,19351,2560617708,92355960,30277476,2026-03-14T01:06:45Z,553,0,151,5
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CC-MAIN-2026-08,543,19172,2514463308,91582405,28716032,2026-03-14T01:13:22Z,726,0,58,35
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CC-MAIN-2026-08,544,19412,2552906080,94266195,30643219,2026-03-14T01:22:32Z,497,0,27,25
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CC-MAIN-2026-08,545,19432,2577257018,97337811,30840334,2026-03-14T01:29:50Z,378,0,85,14
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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-2026-08,790,19525,2564974109,93745695,29844446,2026-03-14T01:06:45Z,771,0,72,5
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CC-MAIN-2026-08,791,19549,2595677953,94842727,29594346,2026-03-14T01:12:35Z,654,0,209,9
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CC-MAIN-2026-08,792,10720,1240933387,57370777,17474176,2026-03-14T01:23:01Z,0,0,23,13
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CC-MAIN-2026-08,793,19518,2529274504,93017510,29938743,2026-03-14T01:30:07Z,346,0,88,0
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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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