Publish shard CC-MAIN-2026-08/00040
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00040.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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|---|---|---|---|
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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) | ~2.4 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 1.
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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 1h
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Convert (HTML → MD) ██████░░░░░░░░░░░░░░░░░░ total 16m 2s avg 16s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) ██████████░░░░░░░░░░░░░░ total
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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 **1,185,523 documents across 60 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 60 files of CC-MAIN-2026-08 (1,185,523 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 60 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~48.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 147.8 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~2.4 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 1.7 GB | ~2.9 TB | **-31.5%** 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 147.8 GB of uncompressed HTML down to 5.1 GB of markdown — a **98.4% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.8%.
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End to end: ~48.6 GB of raw gzipped WARCs becomes **1.7 GB of Parquet** — a **96.6% total reduction** — containing 1,185,523 clean markdown documents.
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### Processing Times
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Pipeline timings across 60 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 1h 3m 57s avg 1m 3s
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Convert (HTML → MD) ██████░░░░░░░░░░░░░░░░░░ total 16m 2s avg 16s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 16m 13s avg 16s
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Publish (HuggingFace) ██████████░░░░░░░░░░░░░░ total 29m 3s avg 29s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00040.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:bb98b4a0652ea06da3e2061d0d98cc5181f0d76d3fdeb9c2af84d840cee65b7f
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size 30943686
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stats.csv
CHANGED
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@@ -52,9 +52,10 @@ CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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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-2026-08,701,19412,2563976599,92296196,29384755,2026-03-13T06:41:28Z,272,0,22,99
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CC-MAIN-2026-08,702,19449,2572639558,92293569,29721653,2026-03-13T06:44:08Z,113,0,20,24
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CC-MAIN-2026-08,703,19592,2602952509,95185029,30720858,2026-03-13T06:49:34Z,187,0,36,100
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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:
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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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-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:50:50Z,116,0,23,0
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CC-MAIN-2026-08,701,19412,2563976599,92296196,29384755,2026-03-13T06:41:28Z,272,0,22,99
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CC-MAIN-2026-08,702,19449,2572639558,92293569,29721653,2026-03-13T06:44:08Z,113,0,20,24
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CC-MAIN-2026-08,703,19592,2602952509,95185029,30720858,2026-03-13T06:49:34Z,187,0,36,100
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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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