Publish shard CC-MAIN-2026-08/00754
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00754.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 **15,
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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) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~33.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 22.5 GB | ~2.9 TB | **-32.4%** 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 1.9 TB of uncompressed HTML down to 70.
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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 46h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 7m 11s avg 13s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 59m
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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 **15,727,403 documents across 813 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 813 files of CC-MAIN-2026-08 (15,727,403 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 813 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~659.0 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~33.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 22.5 GB | ~2.9 TB | **-32.4%** 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 1.9 TB of uncompressed HTML down to 70.9 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 68.2%.
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End to end: ~659.0 GB of raw gzipped WARCs becomes **22.5 GB of Parquet** — a **96.6% total reduction** — containing 15,727,403 clean markdown documents.
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### Processing Times
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Pipeline timings across 813 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 46h 41m 1s avg 3m 26s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 7m 11s avg 13s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h 11m 0s avg 45s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 59m 34s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00754.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:5d94cd85e74f0ca9583d1282feb2cef09093724b7e388cb27fa593bb08ce182f
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size 29169301
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stats.csv
CHANGED
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@@ -255,7 +255,7 @@ CC-MAIN-2026-08,329,19490,2578092970,94257462,29579596,2026-03-13T15:22:02Z,283,
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CC-MAIN-2026-08,330,19236,2590008930,92805723,30030776,2026-03-13T17:50:47Z,0,401,75,0
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CC-MAIN-2026-08,331,19361,2559962643,92469515,29006296,2026-03-13T18:03:29Z,0,471,62,7
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CC-MAIN-2026-08,332,19576,2569972796,95254532,30402651,2026-03-13T18:10:41Z,0,590,62,19
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-
CC-MAIN-2026-08,333,19521,2571725088,93980385,29298182,2026-03-13T18:18:26Z,0,357,104,
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,751,19477,2574917221,91998519,29309299,2026-03-13T17:50:02Z,452,0,71,18
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CC-MAIN-2026-08,752,19489,2571204645,97532082,30423490,2026-03-13T18:03:30Z,520,0,60,7
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CC-MAIN-2026-08,753,19334,2555127733,89627865,28359904,2026-03-13T18:10:41Z,597,0,63,19
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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-2026-08,330,19236,2590008930,92805723,30030776,2026-03-13T17:50:47Z,0,401,75,0
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CC-MAIN-2026-08,331,19361,2559962643,92469515,29006296,2026-03-13T18:03:29Z,0,471,62,7
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CC-MAIN-2026-08,332,19576,2569972796,95254532,30402651,2026-03-13T18:10:41Z,0,590,62,19
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CC-MAIN-2026-08,333,19521,2571725088,93980385,29298182,2026-03-13T18:18:26Z,0,357,104,14
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30560442,2026-03-13T11:49:21Z,0,443,57,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,751,19477,2574917221,91998519,29309299,2026-03-13T17:50:02Z,452,0,71,18
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CC-MAIN-2026-08,752,19489,2571204645,97532082,30423490,2026-03-13T18:03:30Z,520,0,60,7
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CC-MAIN-2026-08,753,19334,2555127733,89627865,28359904,2026-03-13T18:10:41Z,597,0,63,19
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CC-MAIN-2026-08,754,19329,2566006656,91996350,29169301,2026-03-13T18:18:47Z,382,0,100,0
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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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