Publish 2 shards CC-MAIN-2026-08/00197–00358
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00197.parquet +3 -0
- data/CC-MAIN-2026-08/00358.parquet +3 -0
- stats.csv +2 -0
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.
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| Packed markdown WARC (.md.warc.gz) | ~39.
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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.
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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
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 23m 35s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 15h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 54m 13s avg 25s
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```
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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 **18,686,114 documents across 965 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 965 files of CC-MAIN-2026-08 (18,686,114 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 965 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~782.2 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.3 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~39.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 26.8 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 2.3 TB of uncompressed HTML down to 84.3 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: ~782.2 GB of raw gzipped WARCs becomes **26.8 GB of Parquet** — a **96.6% total reduction** — containing 18,686,114 clean markdown documents.
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### Processing Times
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Pipeline timings across 965 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 65h 8m 29s avg 4m 3s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 23m 35s avg 20s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 15h 16m 31s avg 56s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 54m 13s avg 25s
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```
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data/CC-MAIN-2026-08/00197.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:69b5f858b52e613209c6faf6d2ff0d4170cbbe4912df366acad9dce50e89e125
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size 29675226
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data/CC-MAIN-2026-08/00358.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:d89897c09ad6fd3c8820d23615f8029a260d0bc002cfa89d0069fed375405f1f
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size 30945500
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stats.csv
CHANGED
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@@ -197,6 +197,7 @@ CC-MAIN-2026-08,193,19419,2582221477,93138448,30243524,2026-03-13T21:53:56Z,699,
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CC-MAIN-2026-08,194,19501,2557747129,95458846,30399109,2026-03-13T22:02:44Z,419,0,111,27
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CC-MAIN-2026-08,195,19461,2590605003,94963046,29990690,2026-03-13T22:13:26Z,512,0,126,17
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CC-MAIN-2026-08,196,19473,2586001479,97105191,30336090,2026-03-13T22:26:11Z,600,0,169,9
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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-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,355,19508,2528378333,92581345,29133792,2026-03-13T22:02:26Z,0,385,115,13
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CC-MAIN-2026-08,196,19473,2586001479,97105191,30336090,2026-03-13T22:26:11Z,600,0,169,9
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CC-MAIN-2026-08,356,19423,2558791293,93777087,30021761,2026-03-13T22:13:26Z,0,544,121,17
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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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