Publish 2 shards CC-MAIN-2026-08/00523–01274
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00523.parquet +3 -0
- data/CC-MAIN-2026-08/01274.parquet +3 -0
- stats.csv +3 -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 **17,
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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) | 2.2 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~
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| Final Parquet (Zstd level 19) | 25.
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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 80.
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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 59h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 47m 46s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 39m
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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 **17,925,413 documents across 926 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 926 files of CC-MAIN-2026-08 (17,925,413 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 926 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~750.6 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) | ~38.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.7 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 80.8 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: ~750.6 GB of raw gzipped WARCs becomes **25.7 GB of Parquet** — a **96.6% total reduction** — containing 17,925,413 clean markdown documents.
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### Processing Times
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Pipeline timings across 926 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 59h 39m 5s avg 3m 51s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 47m 46s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h 37m 43s avg 52s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 39m 39s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00523.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:2488e315446b40d029e93d82c67ea5ac9871943d87979fccc493953b6b0733ca
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size 30859818
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data/CC-MAIN-2026-08/01274.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:42ef21cd12b482121275408c3e541775a46684619fa8b287154ca161eb5c69ea
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size 30317711
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stats.csv
CHANGED
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@@ -361,6 +361,7 @@ CC-MAIN-2026-08,519,19300,2516139542,91335057,28963596,2026-03-13T20:33:22Z,769,
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@@ -475,7 +476,7 @@ CC-MAIN-2026-08,768,19501,2615201592,97722261,30560353,2026-03-13T20:33:22Z,739,
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@@ -657,6 +658,7 @@ CC-MAIN-2026-08,1270,19556,2561233346,94940691,29262081,2026-03-13T20:34:44Z,658
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