Publish 2 shards CC-MAIN-2026-08/00175–01016
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/00175.parquet +3 -0
- data/CC-MAIN-2026-08/01016.parquet +3 -0
- stats.csv +2 -0
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 **16,
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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) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~34.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.1 GB | ~2.9 TB | **-32.4%** 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 1.9 TB of uncompressed HTML down to 72.
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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 48h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 56m 33s avg
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 7m 36s avg 26s
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```
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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 **16,155,072 documents across 835 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 835 files of CC-MAIN-2026-08 (16,155,072 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 835 files (measured) | 100,000 files (projected) | Reduction |
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| Raw WARC (.warc.gz, downloaded) | ~676.8 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.9 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~34.2 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 23.1 GB | ~2.9 TB | **-32.4%** 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 1.9 TB of uncompressed HTML down to 72.8 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 68.2%.
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End to end: ~676.8 GB of raw gzipped WARCs becomes **23.1 GB of Parquet** — a **96.6% total reduction** — containing 16,155,072 clean markdown documents.
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### Processing Times
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Pipeline timings across 835 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 48h 26m 46s avg 3m 28s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 3h 56m 33s avg 16s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 10h 49m 13s avg 46s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 6h 7m 36s avg 26s
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```
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data/CC-MAIN-2026-08/00175.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:d9c3eb08debd4c8e43821c36f70cc7d9f1ac975f929d79ecfe6cc7affe3baeb6
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size 29300682
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data/CC-MAIN-2026-08/01016.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:c64cb25d668435462729dd6ac627cdb0c65b43067112c932d5c8170bfa1f9dbc
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size 29536751
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stats.csv
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@@ -175,6 +175,7 @@ CC-MAIN-2026-08,171,19525,2569500927,95427462,30216223,2026-03-13T18:12:18Z,480,
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CC-MAIN-2026-08,172,19382,2557076183,96701504,30420156,2026-03-13T18:20:57Z,490,0,56,26
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CC-MAIN-2026-08,173,19312,2574748357,94840263,30552947,2026-03-13T18:32:57Z,615,0,80,28
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CC-MAIN-2026-08,174,19430,2594383888,94151433,30292019,2026-03-13T18:41:24Z,426,0,97,25
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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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-2026-08,1013,19632,2589446285,96006808,30120430,2026-03-13T18:23:56Z,336,0,83,30
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CC-MAIN-2026-08,1014,19503,2566088846,94039374,29397377,2026-03-13T18:32:26Z,429,0,88,26
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CC-MAIN-2026-08,1015,19385,2577073795,90909836,28814674,2026-03-13T18:41:07Z,408,0,97,12
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,172,19382,2557076183,96701504,30420156,2026-03-13T18:20:57Z,490,0,56,26
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CC-MAIN-2026-08,173,19312,2574748357,94840263,30552947,2026-03-13T18:32:57Z,615,0,80,28
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CC-MAIN-2026-08,174,19430,2594383888,94151433,30292019,2026-03-13T18:41:24Z,426,0,97,25
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CC-MAIN-2026-08,175,19361,2535880308,90825657,29300682,2026-03-13T18:51:11Z,500,0,82,0
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CC-MAIN-2026-08,250,19200,2541559671,94959737,30214413,2026-03-13T17:42:47Z,511,0,85,19
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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-2026-08,1014,19503,2566088846,94039374,29397377,2026-03-13T18:32:26Z,429,0,88,26
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CC-MAIN-2026-08,1015,19385,2577073795,90909836,28814674,2026-03-13T18:41:07Z,408,0,97,12
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CC-MAIN-2026-08,1016,19688,2601213579,96284971,29536751,2026-03-13T18:51:11Z,531,0,79,0
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CC-MAIN-2026-08,1101,19721,2641197765,95719568,30240239,2026-03-13T09:59:33Z,564,0,296,0
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CC-MAIN-2026-08,1102,19562,2608129691,99280759,31748974,2026-03-13T10:28:07Z,1518,0,191,0
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CC-MAIN-2026-08,1103,19270,2517580674,89253461,28361470,2026-03-13T10:55:39Z,1380,0,268,0
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