Publish shard CC-MAIN-2026-08/00194
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00194.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 **18,
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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) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~38.
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| Final Parquet (Zstd level 19) | 26.
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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 2.2 TB of uncompressed HTML down to 82.
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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 62h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 5h 14m 31s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 14h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 48m
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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 **18,334,528 documents across 947 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 947 files of CC-MAIN-2026-08 (18,334,528 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 947 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~767.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~38.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 26.3 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 2.2 TB of uncompressed HTML down to 82.7 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: ~767.6 GB of raw gzipped WARCs becomes **26.3 GB of Parquet** — a **96.6% total reduction** — containing 18,334,528 clean markdown documents.
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### Processing Times
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Pipeline timings across 947 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 62h 37m 23s avg 3m 58s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 5h 14m 31s avg 19s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 14h 27m 12s avg 54s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 48m 59s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00194.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a3627a4af3d8ab0356f4ee6c36a5fdfd271b02f3e094edb155924e43c121b001
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size 30399109
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stats.csv
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@@ -194,6 +194,7 @@ CC-MAIN-2026-08,190,19346,2567101082,94155671,29866255,2026-03-13T21:16:12Z,437,
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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CC-MAIN-2026-08,354,19427,2562359871,96600307,30529507,2026-03-13T21:53:56Z,0,701,184,15
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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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