Publish shard CC-MAIN-2026-08/00112
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00112.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 **2,
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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) | ~4.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.
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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) ████████████████████████ total 3h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 8s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 46m
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h
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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 **2,235,331 documents across 114 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 114 files of CC-MAIN-2026-08 (2,235,331 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 114 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~92.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 277.4 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~4.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.2 GB | ~2.9 TB | **-31.8%** 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 277.4 GB of uncompressed HTML down to 9.9 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 68.0%.
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End to end: ~92.4 GB of raw gzipped WARCs becomes **3.2 GB of Parquet** — a **96.6% total reduction** — containing 2,235,331 clean markdown documents.
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### Processing Times
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Pipeline timings across 114 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 3h 49m 32s avg 2m 0s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 8s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 46m 39s avg 24s
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░░ total 1h 14m 8s avg 39s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00112.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:2ce8b9819b99626a6299ad1891d881e612dfbe84df02599244fe0064a218eb61
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size 29155400
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stats.csv
CHANGED
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@@ -58,6 +58,7 @@ CC-MAIN-2026-08,108,19400,2604607711,92680586,29321154,2026-03-13T07:15:10Z,157,
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CC-MAIN-2026-08,109,19487,2556703136,91883241,29188577,2026-03-13T07:19:05Z,164,0,26,43
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CC-MAIN-2026-08,110,19345,2585860073,93489029,30521102,2026-03-13T07:23:31Z,221,0,31,11
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CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,0,34,18
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,859,19255,2580352354,93040618,29288941,2026-03-13T07:16:37Z,158,0,22,31
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CC-MAIN-2026-08,860,19579,2621603372,97234729,30832377,2026-03-13T07:22:32Z,272,0,37,44
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CC-MAIN-2026-08,861,19490,2569643917,90715876,29081843,2026-03-13T07:25:26Z,115,0,24,32
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CC-MAIN-2026-08,862,19535,2608751766,96008732,30532163,2026-03-13T07:28:
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CC-MAIN-2026-08,109,19487,2556703136,91883241,29188577,2026-03-13T07:19:05Z,164,0,26,43
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CC-MAIN-2026-08,110,19345,2585860073,93489029,30521102,2026-03-13T07:23:31Z,221,0,31,11
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CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,0,34,18
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CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:28:40Z,119,0,27,0
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CC-MAIN-2026-08,251,19610,2594898345,97558492,31917087,2026-03-13T06:42:12Z,277,0,23,136
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CC-MAIN-2026-08,252,19240,2525928701,98163046,31104034,2026-03-13T06:47:10Z,238,0,49,10
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CC-MAIN-2026-08,253,19312,2557230855,96017199,30399966,2026-03-13T06:51:42Z,130,0,23,117
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CC-MAIN-2026-08,859,19255,2580352354,93040618,29288941,2026-03-13T07:16:37Z,158,0,22,31
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| 113 |
CC-MAIN-2026-08,860,19579,2621603372,97234729,30832377,2026-03-13T07:22:32Z,272,0,37,44
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| 114 |
CC-MAIN-2026-08,861,19490,2569643917,90715876,29081843,2026-03-13T07:25:26Z,115,0,24,32
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+
CC-MAIN-2026-08,862,19535,2608751766,96008732,30532163,2026-03-13T07:28:35Z,129,0,28,30
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