Publish shard CC-MAIN-2026-08/00115
Browse files- README.md +12 -12
- data/CC-MAIN-2026-08/00115.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 **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) | ~5.
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| Final Parquet (Zstd level 19) | 3.6 GB | ~2.9 TB | **-31.9%** 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
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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 4h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 7s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total
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Publish (HuggingFace) ███████░░░░░░░░░░░░░░░░
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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 **2,546,255 documents across 130 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 130 files of CC-MAIN-2026-08 (2,546,255 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 130 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~105.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 315.8 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~5.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 3.6 GB | ~2.9 TB | **-31.9%** 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 315.8 GB of uncompressed HTML down to 11.3 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 68.0%.
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End to end: ~105.4 GB of raw gzipped WARCs becomes **3.6 GB of Parquet** — a **96.6% total reduction** — containing 2,546,255 clean markdown documents.
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### Processing Times
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Pipeline timings across 130 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 4h 26m 10s avg 2m 2s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 7s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 53m 48s avg 24s
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Publish (HuggingFace) ████████░░░░░░░░░░░░░░░░ total 1h 31m 51s avg 42s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00115.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:42a08ec66943da7ec4f7c13a958975fe6279fbfaafb4b0bb426f3aaf2b70c33b
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size 30983238
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stats.csv
CHANGED
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@@ -61,6 +61,7 @@ CC-MAIN-2026-08,111,19477,2631100726,91693229,29275356,2026-03-13T07:26:13Z,107,
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CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:29:14Z,119,0,27,33
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CC-MAIN-2026-08,113,19468,2542994320,95581406,30306018,2026-03-13T07:33:54Z,123,0,21,135
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CC-MAIN-2026-08,114,19566,2594000707,94155018,31079211,2026-03-13T07:39:16Z,183,0,27,109
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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-2026-08,262,19342,2556139647,91304795,28470338,2026-03-13T07:28:17Z,136,0,23,7
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CC-MAIN-2026-08,263,19704,2599536323,94011169,29652032,2026-03-13T07:32:21Z,124,0,35,83
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CC-MAIN-2026-08,264,19509,2596140017,96135571,30432948,2026-03-13T07:35:25Z,85,0,22,75
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CC-MAIN-2026-08,265,19163,2575701286,97203181,30476269,2026-03-13T07:
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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-2026-08,863,19545,2590081820,92582175,29356410,2026-03-13T07:34:02Z,131,0,28,164
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CC-MAIN-2026-08,864,19304,2546300382,91040684,28811041,2026-03-13T07:39:13Z,182,0,22,105
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CC-MAIN-2026-08,112,19303,2509547426,90712416,29155400,2026-03-13T07:29:14Z,119,0,27,33
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CC-MAIN-2026-08,113,19468,2542994320,95581406,30306018,2026-03-13T07:33:54Z,123,0,21,135
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CC-MAIN-2026-08,114,19566,2594000707,94155018,31079211,2026-03-13T07:39:16Z,183,0,27,109
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CC-MAIN-2026-08,115,19409,2567533083,97298312,30983238,2026-03-13T07:42:12Z,128,0,47,0
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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-2026-08,262,19342,2556139647,91304795,28470338,2026-03-13T07:28:17Z,136,0,23,7
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CC-MAIN-2026-08,263,19704,2599536323,94011169,29652032,2026-03-13T07:32:21Z,124,0,35,83
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CC-MAIN-2026-08,264,19509,2596140017,96135571,30432948,2026-03-13T07:35:25Z,85,0,22,75
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CC-MAIN-2026-08,265,19163,2575701286,97203181,30476269,2026-03-13T07:39:20Z,138,0,23,72
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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-2026-08,862,19535,2608751766,96008732,30532163,2026-03-13T07:28:35Z,129,0,28,30
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CC-MAIN-2026-08,863,19545,2590081820,92582175,29356410,2026-03-13T07:34:02Z,131,0,28,164
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CC-MAIN-2026-08,864,19304,2546300382,91040684,28811041,2026-03-13T07:39:13Z,182,0,22,105
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CC-MAIN-2026-08,865,19211,2557891798,96126883,30876712,2026-03-13T07:42:40Z,183,0,23,0
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