Publish shard CC-MAIN-2026-08/00336
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00336.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 **16,
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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) | ~34.
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| Final Parquet (Zstd level 19) | 23.0 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 72.
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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 48h 2m 49s avg 3m 28s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 6m
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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 **16,077,531 documents across 831 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 831 files of CC-MAIN-2026-08 (16,077,531 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 831 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~673.6 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) | ~34.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.0 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 72.5 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: ~673.6 GB of raw gzipped WARCs becomes **23.0 GB of Parquet** — a **96.6% total reduction** — containing 16,077,531 clean markdown documents.
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### Processing Times
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Pipeline timings across 831 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 48h 2m 49s avg 3m 28s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 49m 21s avg 16s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h 43m 1s avg 46s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 6m 32s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00336.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:073047a12daf5edf523d97f0dce145923540421340943eb195ae10b939da2529
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size 30443713
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stats.csv
CHANGED
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@@ -261,6 +261,7 @@ CC-MAIN-2026-08,332,19576,2569972796,95254532,30402651,2026-03-13T18:10:41Z,0,59
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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-2026-08,335,19262,2576133430,95288720,29611938,2026-03-13T18:34:27Z,0,454,88,33
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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-2026-08,754,19329,2566006656,91996350,29169301,2026-03-13T18:18:47Z,382,0,100,28
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CC-MAIN-2026-08,755,19381,2559472362,94370252,30420342,2026-03-13T18:25:58Z,330,0,97,28
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CC-MAIN-2026-08,756,19494,2576683987,96595694,31300764,2026-03-13T18:35:21Z,412,0,136,28
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CC-MAIN-2026-08,757,19539,2604837549,90805230,28789224,2026-03-13T18:43:16Z,369,0,61,
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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-2026-08,333,19521,2571725088,93980385,29298182,2026-03-13T18:18:26Z,0,357,104,14
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CC-MAIN-2026-08,334,19200,2505425210,91193061,28513905,2026-03-13T18:25:11Z,0,336,73,20
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CC-MAIN-2026-08,335,19262,2576133430,95288720,29611938,2026-03-13T18:34:27Z,0,454,88,33
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CC-MAIN-2026-08,336,19436,2580771346,97329551,30443713,2026-03-13T18:44:06Z,0,427,128,0
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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-2026-08,754,19329,2566006656,91996350,29169301,2026-03-13T18:18:47Z,382,0,100,28
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CC-MAIN-2026-08,755,19381,2559472362,94370252,30420342,2026-03-13T18:25:58Z,330,0,97,28
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CC-MAIN-2026-08,756,19494,2576683987,96595694,31300764,2026-03-13T18:35:21Z,412,0,136,28
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CC-MAIN-2026-08,757,19539,2604837549,90805230,28789224,2026-03-13T18:43:16Z,369,0,61,27
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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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