Publish shard CC-MAIN-2026-08/00770
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00770.parquet +3 -0
- stats.csv +4 -3
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) | ~740.
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| HTML extracted (uncompressed) | 2.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~37.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.3 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 2.1 TB of uncompressed HTML down to 79.
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End to end: ~740.
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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 4h 40m 31s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h
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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 **17,692,620 documents across 914 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 914 files of CC-MAIN-2026-08 (17,692,620 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 914 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~740.8 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~37.5 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 25.3 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 2.1 TB of uncompressed HTML down to 79.8 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: ~740.8 GB of raw gzipped WARCs becomes **25.3 GB of Parquet** — a **96.6% total reduction** — containing 17,692,620 clean markdown documents.
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### Processing Times
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Pipeline timings across 914 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 58h 8m 14s avg 3m 48s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 4h 40m 31s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 13h 14m 14s avg 52s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 36m 1s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00770.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:2038f54880020f35842f3b63d8760938dbda0c9b24d2a99c2a631648eba8cab8
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size 30913397
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stats.csv
CHANGED
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@@ -355,7 +355,7 @@ CC-MAIN-2026-08,517,19333,2578621012,89099863,28880437,2026-03-13T20:10:04Z,547,
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