Publish shard CC-MAIN-2026-08/02326
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/02326.parquet +3 -0
- stats.csv +7 -6
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 **13,
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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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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~560.
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| HTML extracted (uncompressed) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~28.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 19.
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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 1.6 TB of uncompressed HTML down to 60.
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End to end: ~560.
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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 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 16m
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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 **13,372,360 documents across 692 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 692 files of CC-MAIN-2026-08 (13,372,360 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 692 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~560.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~28.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 19.2 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 1.6 TB of uncompressed HTML down to 60.3 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: ~560.9 GB of raw gzipped WARCs becomes **19.2 GB of Parquet** — a **96.6% total reduction** — containing 13,372,360 clean markdown documents.
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### Processing Times
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Pipeline timings across 692 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 36h 5m 9s avg 3m 7s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 9s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 6m 19s avg 42s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 16m 52s avg 27s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02326.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:fdf729e1dabdac68c67fbbbb9c5aa5eb8f88b3e2542af0a70f7751e4e23a5213
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size 30194739
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stats.csv
CHANGED
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@@ -609,7 +609,7 @@ CC-MAIN-2026-08,2118,19302,2521963037,93737153,29468403,2026-03-13T13:39:44Z,118
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