Publish shard CC-MAIN-2026-08/00101
Browse files- README.md +14 -14
- data/CC-MAIN-2026-08/00101.parquet +3 -0
- stats.csv +7 -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 **
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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) |
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| Packed markdown WARC (.md.warc.gz) | ~1.
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| Final Parquet (Zstd level 19) | 1.
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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
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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)
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Convert (HTML → MD) ████████████████
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Export (Parquet) █████░░░░░░░░░░░░░░░░░
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total
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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 **874,019 documents across 44 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 44 files of CC-MAIN-2026-08 (874,019 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 44 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~35.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 109.4 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~1.7 GB | ~3.7 TB | **-98.4%** vs HTML |
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| Final Parquet (Zstd level 19) | 1.2 GB | ~2.9 TB | **-31.3%** 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 109.4 GB of uncompressed HTML down to 3.7 GB of markdown — a **98.4% reduction** — before any file-level compression is applied. Parquet with Zstd level 19 then compresses the markdown a further 67.7%.
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End to end: ~35.7 GB of raw gzipped WARCs becomes **1.2 GB of Parquet** — a **96.6% total reduction** — containing 874,019 clean markdown documents.
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### Processing Times
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Pipeline timings across 44 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 23m 9s avg 31s
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Convert (HTML → MD) ████████████████░░░░░░░░ total 16m 2s avg 21s
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Export (Parquet) ███████░░░░░░░░░░░░░░░░░ total 7m 5s avg 9s
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Publish (HuggingFace) ████░░░░░░░░░░░░░░░░░░░░ total 4m 23s avg 5s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00101.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:a3197854b2ecc29092b4a993959dff8463793835d330fdc3a13e1f0dc42b3711
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size 30875010
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stats.csv
CHANGED
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@@ -36,4 +36,10 @@ CC-MAIN-2026-08,33,19518,2578498764,96012533,30445671,2026-03-13T06:02:40Z,0,78,
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CC-MAIN-2026-08,34,19325,2535567258,94812059,30450886,2026-03-13T06:05:00Z,0,115,17,3
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CC-MAIN-2026-08,35,19398,2565260259,94010975,30284205,2026-03-13T06:06:37Z,0,72,17,3
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CC-MAIN-2026-08,36,19367,2577531843,94004962,29843828,2026-03-13T06:08:12Z,0,69,18,2
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CC-MAIN-2026-08,37,19314,2558501740,95109133,29807147,2026-03-13T06:
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CC-MAIN-2026-08,34,19325,2535567258,94812059,30450886,2026-03-13T06:05:00Z,0,115,17,3
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CC-MAIN-2026-08,35,19398,2565260259,94010975,30284205,2026-03-13T06:06:37Z,0,72,17,3
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CC-MAIN-2026-08,36,19367,2577531843,94004962,29843828,2026-03-13T06:08:12Z,0,69,18,2
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CC-MAIN-2026-08,37,19314,2558501740,95109133,29807147,2026-03-13T06:37:54Z,0,63,19,96
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CC-MAIN-2026-08,101,19267,2514449658,96925434,30875010,2026-03-13T06:38:43Z,179,0,50,0
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:39:56Z,277,0,23,0
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:39:20Z,218,0,47,0
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CC-MAIN-2026-08,551,19551,2609034951,89980913,29167227,2026-03-13T06:39:55Z,280,0,20,0
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CC-MAIN-2026-08,701,19412,2563976599,92296196,29384755,2026-03-13T06:39:49Z,272,0,22,0
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CC-MAIN-2026-08,851,19575,2612873485,97000364,30911294,2026-03-13T06:38:14Z,163,0,37,0
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