Publish shard CC-MAIN-2026-08/00516
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00516.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 **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) | ~
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| HTML extracted (uncompressed) | 2.1 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~36.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.4 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 76.
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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 53h
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h
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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 **17,049,073 documents across 881 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 881 files of CC-MAIN-2026-08 (17,049,073 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 881 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~714.1 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) | ~36.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 24.4 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 76.9 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: ~714.1 GB of raw gzipped WARCs becomes **24.4 GB of Parquet** — a **96.6% total reduction** — containing 17,049,073 clean markdown documents.
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### Processing Times
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Pipeline timings across 881 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 53h 28m 48s avg 3m 38s
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Convert (HTML → MD) ██░░░░░░░░░░░░░░░░░░░░░░ total 4h 30m 54s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 12h 8m 4s avg 49s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 6h 23m 24s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00516.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:5f295418fa6648d0f26061796cd919db5bf59b438c3bf7c9981bd1fca61d606b
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size 30793330
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stats.csv
CHANGED
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@@ -277,7 +277,7 @@ CC-MAIN-2026-08,340,19791,2598516873,95489194,31690779,2026-03-13T19:18:46Z,0,43
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-
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@@ -339,6 +339,7 @@ CC-MAIN-2026-08,512,19409,2588385924,92008152,29561232,2026-03-13T19:21:41Z,365,
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@@ -446,7 +447,7 @@ CC-MAIN-2026-08,761,19312,2565263834,92599487,29887045,2026-03-13T19:20:20Z,498,
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