Publish 2 shards CC-MAIN-2026-08/00211–00792
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/00211.parquet +3 -0
- data/CC-MAIN-2026-08/00792.parquet +3 -0
- stats.csv +3 -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 **21,
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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) | 2.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~45.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 31.0 GB | ~2.9 TB | **-32.
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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 2.6 TB of uncompressed HTML down to 97.
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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 85h 13m 25s avg 4m 33s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h
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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 **21,668,813 documents across 1122 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 1122 files of CC-MAIN-2026-08 (21,668,813 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 1122 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~909.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 2.6 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~45.9 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 31.0 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 2.6 TB of uncompressed HTML down to 97.8 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 68.3%.
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End to end: ~909.4 GB of raw gzipped WARCs becomes **31.0 GB of Parquet** — a **96.6% total reduction** — containing 21,668,813 clean markdown documents.
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### Processing Times
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Pipeline timings across 1122 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 85h 13m 25s avg 4m 33s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 5h 55m 4s avg 18s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 20h 33m 31s avg 1m 5s
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Publish (HuggingFace) ██░░░░░░░░░░░░░░░░░░░░░░ total 7h 19m 14s avg 23s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00211.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:25d6449bc833ec8b1bd0301da792819a1ab19b189de36a88fb30fcaf3ed23033
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size 20146574
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data/CC-MAIN-2026-08/00792.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:d1ffab67ae8c390e43c07353b70c565f2b8fdabaa87b5640888fda399706ab8d
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size 17474176
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stats.csv
CHANGED
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@@ -211,6 +211,7 @@ CC-MAIN-2026-08,207,19378,2547069352,92869998,29962538,2026-03-14T01:06:43Z,594,
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CC-MAIN-2026-08,208,19535,2594141211,95975058,29626564,2026-03-14T01:06:44Z,855,0,81,5
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CC-MAIN-2026-08,210,19330,2559492399,92707630,28965419,2026-03-14T01:12:35Z,662,0,194,9
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CC-MAIN-2026-08,541,19435,2582602988,93523616,29414799,2026-03-14T01:06:44Z,641,0,263,5
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CC-MAIN-2026-08,542,19351,2560617708,92355960,30277476,2026-03-14T01:06:45Z,553,0,151,5
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@@ -557,6 +558,7 @@ CC-MAIN-2026-08,788,19342,2556221932,93290980,29759739,2026-03-14T01:06:45Z,689,
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CC-MAIN-2026-08,553,19856,2617133708,99106486,30365588,2026-03-13T06:52:51Z,116,0,23,120
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