Publish shard CC-MAIN-2026-08/00285
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00285.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 **3,
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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) | ~158.
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| HTML extracted (uncompressed) |
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| Packed markdown WARC (.md.warc.gz) | ~8.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 5.
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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: ~158.
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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 6h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 4s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h
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Publish (HuggingFace) ███████████░░░░░░░░░░░░░ total 3h
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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 **3,826,504 documents across 196 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 196 files of CC-MAIN-2026-08 (3,826,504 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 196 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~158.9 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 473.6 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~8.0 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 5.5 GB | ~2.9 TB | **-32.1%** 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 473.6 GB of uncompressed HTML down to 17.1 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 68.1%.
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End to end: ~158.9 GB of raw gzipped WARCs becomes **5.5 GB of Parquet** — a **96.6% total reduction** — containing 3,826,504 clean markdown documents.
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### Processing Times
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Pipeline timings across 196 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 6h 27m 10s avg 1m 58s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 4s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h 19m 14s avg 24s
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Publish (HuggingFace) ███████████░░░░░░░░░░░░░ total 3h 2m 14s avg 55s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00285.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:99e5f07ce2d6c37b0217449bfce46db000a73dfddcf1cd3d19284b2475cec689
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size 30988415
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stats.csv
CHANGED
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@@ -115,6 +115,7 @@ CC-MAIN-2026-08,281,19416,2587645863,94698501,30673039,2026-03-13T08:26:40Z,136,
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CC-MAIN-2026-08,282,19425,2542414332,94704569,29892625,2026-03-13T08:28:42Z,87,0,21,11
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CC-MAIN-2026-08,283,19405,2575019840,93976705,30759536,2026-03-13T08:32:01Z,147,0,26,25
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CC-MAIN-2026-08,284,19238,2531057319,96819690,32221564,2026-03-13T08:34:31Z,100,0,41,6
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,878,19371,2591184192,98118180,30281755,2026-03-13T08:25:59Z,147,0,28,6
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CC-MAIN-2026-08,879,19553,2569444239,95701279,30858541,2026-03-13T08:28:36Z,88,0,23,43
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CC-MAIN-2026-08,880,19493,2562178225,98671696,30493564,2026-03-13T08:32:06Z,154,0,26,28
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CC-MAIN-2026-08,881,19336,2555937495,93001627,29739925,2026-03-13T08:
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CC-MAIN-2026-08,282,19425,2542414332,94704569,29892625,2026-03-13T08:28:42Z,87,0,21,11
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CC-MAIN-2026-08,283,19405,2575019840,93976705,30759536,2026-03-13T08:32:01Z,147,0,26,25
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CC-MAIN-2026-08,284,19238,2531057319,96819690,32221564,2026-03-13T08:34:31Z,100,0,41,6
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CC-MAIN-2026-08,285,19103,2525313092,97567435,30988415,2026-03-13T08:36:11Z,76,0,23,0
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CC-MAIN-2026-08,401,19517,2605589961,95609438,30404753,2026-03-13T06:41:08Z,218,0,47,107
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CC-MAIN-2026-08,402,19446,2552785517,96654791,30588984,2026-03-13T06:43:58Z,98,0,26,44
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CC-MAIN-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,878,19371,2591184192,98118180,30281755,2026-03-13T08:25:59Z,147,0,28,6
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CC-MAIN-2026-08,879,19553,2569444239,95701279,30858541,2026-03-13T08:28:36Z,88,0,23,43
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CC-MAIN-2026-08,880,19493,2562178225,98671696,30493564,2026-03-13T08:32:06Z,154,0,26,28
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CC-MAIN-2026-08,881,19336,2555937495,93001627,29739925,2026-03-13T08:35:55Z,143,0,21,63
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