Publish shard CC-MAIN-2026-08/00380
Browse files- README.md +9 -9
- data/CC-MAIN-2026-08/00380.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 **24,
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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) | 2.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~51.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 34.7 GB | ~2.9 TB | **-32.5%** 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 2.9 TB of uncompressed HTML down to 109.3 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 68.3%.
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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 96h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 6h 2m 48s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 23h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h
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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 **24,236,778 documents across 1254 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 1254 files of CC-MAIN-2026-08 (24,236,778 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1254 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~1016.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~51.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 34.7 GB | ~2.9 TB | **-32.5%** 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 2.9 TB of uncompressed HTML down to 109.3 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 68.3%.
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End to end: ~1016.4 GB of raw gzipped WARCs becomes **34.7 GB of Parquet** — a **96.6% total reduction** — containing 24,236,778 clean markdown documents.
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### Processing Times
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Pipeline timings across 1254 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 96h 13m 56s avg 4m 36s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 6h 2m 48s avg 17s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 23h 21m 18s avg 1m 7s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 7h 52m 19s avg 22s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00380.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:3418a8f379f00f3be02ee3eeeced54d76c585bf1b3f3754daf82eed451696aca
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size 28624484
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stats.csv
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@@ -349,6 +349,7 @@ CC-MAIN-2026-08,376,19603,2573100392,94744832,31392835,2026-03-14T02:02:32Z,474,
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CC-MAIN-2026-08,401,19441,2586676962,94334130,29618260,2026-03-13T11:41:00Z,0,0,33,0
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29341198,2026-03-13T11:56:46Z,0,414,29,0
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CC-MAIN-2026-08,378,19520,2557252949,91815354,29665998,2026-03-14T02:24:41Z,543,0,167,14
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CC-MAIN-2026-08,379,19426,2552876640,91839182,29849311,2026-03-14T02:34:20Z,420,0,159,13
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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