Publish shard CC-MAIN-2026-08/05769
Browse files- README.md +10 -10
- charts/timing_chart.png +2 -2
- charts/totals_chart.png +2 -2
- data/CC-MAIN-2026-08/05769.parquet +3 -0
- stats.csv +3 -2
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 **22,
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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) | 2.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~48.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 32.9 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 2.8 TB of uncompressed HTML down to 103.
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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 84h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 48m 17s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 50m
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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 **22,996,353 documents across 1189 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 1189 files of CC-MAIN-2026-08 (22,996,353 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1189 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~963.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~48.7 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 32.9 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 2.8 TB of uncompressed HTML down to 103.7 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 68.3%.
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End to end: ~963.7 GB of raw gzipped WARCs becomes **32.9 GB of Parquet** — a **96.6% total reduction** — containing 22,996,353 clean markdown documents.
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### Processing Times
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Pipeline timings across 1189 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 84h 49m 26s avg 4m 16s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 48m 17s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h 29m 31s avg 1m 2s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 50m 43s avg 23s
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```
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### Dataset Charts
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charts/timing_chart.png
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Git LFS Details
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Git LFS Details
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charts/totals_chart.png
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Git LFS Details
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Git LFS Details
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data/CC-MAIN-2026-08/05769.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:ea6e209ad1def9cdc069a4b41ea481ca3db1f097cd5a5d8a9bc807737a4b3d1e
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size 29581573
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stats.csv
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@@ -1103,7 +1103,7 @@ CC-MAIN-2026-08,5014,19586,2541785127,94301659,29785395,2026-03-14T01:49:27Z,266
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