Publish shard CC-MAIN-2026-08/00136
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00136.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 **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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|---|---|---|---|
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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) | ~8.
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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: ~
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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 **3,982,228 documents across 204 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 204 files of CC-MAIN-2026-08 (3,982,228 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 204 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~165.4 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 492.9 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~8.4 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 5.7 GB | ~2.9 TB | **-32.0%** 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 492.9 GB of uncompressed HTML down to 17.8 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 68.1%.
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End to end: ~165.4 GB of raw gzipped WARCs becomes **5.7 GB of Parquet** — a **96.6% total reduction** — containing 3,982,228 clean markdown documents.
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### Processing Times
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Pipeline timings across 204 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 6h 41m 55s avg 1m 58s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 4s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h 22m 36s avg 24s
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Publish (HuggingFace) ███████████░░░░░░░░░░░░░ total 3h 5m 0s avg 54s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00136.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:eb75f019066c4677604ce10f1c15711081c7510dbb2a552f3267be7ed15897f9
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size 29172272
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stats.csv
CHANGED
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@@ -82,6 +82,7 @@ CC-MAIN-2026-08,132,19435,2544146767,92405646,29839524,2026-03-13T08:31:23Z,177,
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CC-MAIN-2026-08,133,19763,2615231266,98239071,31556189,2026-03-13T08:33:22Z,86,0,22,8
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CC-MAIN-2026-08,134,19342,2557433709,95423683,30581325,2026-03-13T08:35:45Z,97,0,22,22
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CC-MAIN-2026-08,135,19366,2564048477,96359527,30751456,2026-03-13T08:38:48Z,110,0,34,32
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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-2026-08,284,19238,2531057319,96819690,32221564,2026-03-13T08:34:31Z,100,0,41,6
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CC-MAIN-2026-08,285,19103,2525313092,97567435,30988415,2026-03-13T08:36:32Z,76,0,23,20
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CC-MAIN-2026-08,286,19521,2604143328,95453072,31055879,2026-03-13T08:39:07Z,116,0,23,13
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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-2026-08,403,19320,2579048144,91406292,29375992,2026-03-13T06:49:29Z,198,0,33,98
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CC-MAIN-2026-08,135,19366,2564048477,96359527,30751456,2026-03-13T08:38:48Z,110,0,34,32
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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-2026-08,284,19238,2531057319,96819690,32221564,2026-03-13T08:34:31Z,100,0,41,6
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CC-MAIN-2026-08,285,19103,2525313092,97567435,30988415,2026-03-13T08:36:32Z,76,0,23,20
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CC-MAIN-2026-08,286,19521,2604143328,95453072,31055879,2026-03-13T08:39:07Z,116,0,23,13
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CC-MAIN-2026-08,287,19554,2584064050,99218907,31127830,2026-03-13T08:41:27Z,116,0,22,0
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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-2026-08,880,19493,2562178225,98671696,30493564,2026-03-13T08:32:06Z,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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CC-MAIN-2026-08,882,19452,2590686157,88956978,28905096,2026-03-13T08:38:35Z,118,0,31,8
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CC-MAIN-2026-08,883,19257,2558252415,92279950,30785208,2026-03-13T08:41:09Z,114,0,30,8
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