Publish shard CC-MAIN-2026-08/01250
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/01250.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.
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| Final Parquet (Zstd level 19) | 21.
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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.
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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 51m
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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 **15,183,332 documents across 785 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 785 files of CC-MAIN-2026-08 (15,183,332 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 785 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~636.3 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: ~636.3 GB of raw gzipped WARCs becomes **21.8 GB of Parquet** — a **96.6% total reduction** — containing 15,183,332 clean markdown documents.
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### Processing Times
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Pipeline timings across 785 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 44h 35m 49s avg 3m 24s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 56m 12s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 30m 4s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 51m 34s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01250.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:abe01e65d5fe3957d995d749b48934b1ea8c9f29d92fe611e736381633402e69
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size 30182713
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stats.csv
CHANGED
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@@ -94,7 +94,7 @@ CC-MAIN-2026-08,90,19236,2517796572,93735940,29562700,2026-03-13T13:45:07Z,88,0,
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-
CC-MAIN-2026-08,94,19407,2565026021,94786307,30258982,2026-03-13T17:40:03Z,0,339,94,
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CC-MAIN-2026-08,100,19468,2560323629,93642547,30026373,2026-03-13T15:51:46Z,201,0,28,0
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CC-MAIN-2026-08,94,19407,2565026021,94786307,30258982,2026-03-13T17:40:03Z,0,339,94,30
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CC-MAIN-2026-08,1207,19457,2587304186,94642420,29428000,2026-03-13T12:01:50Z,205,0,76,0
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