Publish shard CC-MAIN-2026-08/00750
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00750.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) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~32.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.8 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 1.8 TB of uncompressed HTML down to 68.5 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: ~
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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 44h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 56m 12s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h
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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 **15,202,803 documents across 786 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 786 files of CC-MAIN-2026-08 (15,202,803 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 786 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~637.1 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~32.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.8 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 1.8 TB of uncompressed HTML down to 68.5 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: ~637.1 GB of raw gzipped WARCs becomes **21.8 GB of Parquet** — a **96.6% total reduction** — containing 15,202,803 clean markdown documents.
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### Processing Times
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Pipeline timings across 786 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 44h 43m 4s avg 3m 24s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 56m 12s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 31m 14s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 52m 0s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00750.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:f476a28ea82736fa79ddf79071116137fee1fed60551fcdb357ff5c588376a0b
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size 29734352
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stats.csv
CHANGED
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@@ -384,6 +384,7 @@ CC-MAIN-2026-08,738,19381,2580510880,97427741,31334407,2026-03-13T11:42:32Z,236,
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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-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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