Publish shard CC-MAIN-2026-08/01594
Browse files- README.md +10 -10
- data/CC-MAIN-2026-08/01594.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 **47,
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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) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~101.
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| Final Parquet (Zstd level 19) | 68.3 GB | ~2.9 TB | **-32.5%** 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 5.8 TB of uncompressed HTML down to 215.
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End to end: ~2.0 TB of raw gzipped WARCs becomes **68.3 GB of Parquet** — a **96.6% total reduction** — containing 47,
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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 213h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 55h
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 38m
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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 **47,900,241 documents across 2472 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 2472 files of CC-MAIN-2026-08 (47,900,241 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 2472 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~2.0 TB | ~83 TB | — |
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| HTML extracted (uncompressed) | 5.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~101.3 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 68.3 GB | ~2.9 TB | **-32.5%** 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 5.8 TB of uncompressed HTML down to 215.5 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 68.3%.
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End to end: ~2.0 TB of raw gzipped WARCs becomes **68.3 GB of Parquet** — a **96.6% total reduction** — containing 47,900,241 clean markdown documents.
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### Processing Times
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Pipeline timings across 2472 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 213h 43m 55s avg 5m 11s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 12h 57m 19s avg 18s
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Export (Parquet) ██████░░░░░░░░░░░░░░░░░░ total 55h 8m 28s avg 1m 20s
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Publish (HuggingFace) █░░░░░░░░░░░░░░░░░░░░░░░ total 17h 38m 47s avg 25s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01594.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:26b287d3b61839f304a269769341643f9bc95249984e1265ae89d72031cb69fc
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size 29494120
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stats.csv
CHANGED
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@@ -858,7 +858,7 @@ CC-MAIN-2026-08,918,19597,2580097026,94188557,29611897,2026-03-14T16:12:37Z,1208
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| 858 |
CC-MAIN-2026-08,919,19253,2556548461,95660440,29984976,2026-03-14T16:32:45Z,814,0,428,19
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CC-MAIN-2026-08,921,19336,2562062820,94054773,30754989,2026-03-13T13:59:15Z,338,0,29,0
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CC-MAIN-2026-08,922,19539,2532904600,91826410,29762394,2026-03-14T16:52:07Z,766,0,393,
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CC-MAIN-2026-08,930,19425,2563571878,93507547,29730912,2026-03-13T14:07:36Z,198,0,21,0
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CC-MAIN-2026-08,1000,19490,2581039608,93029785,29406839,2026-03-13T11:28:30Z,251,0,36,0
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CC-MAIN-2026-08,1001,19530,2577623205,97623904,31829877,2026-03-13T10:02:20Z,605,0,422,0
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CC-MAIN-2026-08,1591,19426,2558230699,95277468,29580497,2026-03-14T16:25:38Z,308,0,25,16
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CC-MAIN-2026-08,1592,19523,2578205198,98560558,31078365,2026-03-14T16:35:59Z,550,0,49,97
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CC-MAIN-2026-08,1593,19470,2570746590,95127149,30237697,2026-03-14T16:44:08Z,454,0,53,41
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CC-MAIN-2026-08,922,19539,2532904600,91826410,29762394,2026-03-14T16:52:07Z,766,0,393,47
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CC-MAIN-2026-08,930,19425,2563571878,93507547,29730912,2026-03-13T14:07:36Z,198,0,21,0
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CC-MAIN-2026-08,1001,19530,2577623205,97623904,31829877,2026-03-13T10:02:20Z,605,0,422,0
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CC-MAIN-2026-08,1592,19523,2578205198,98560558,31078365,2026-03-14T16:35:59Z,550,0,49,97
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CC-MAIN-2026-08,1593,19470,2570746590,95127149,30237697,2026-03-14T16:44:08Z,454,0,53,41
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CC-MAIN-2026-08,1594,19489,2587369923,93013488,29494120,2026-03-14T16:53:08Z,489,0,62,0
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CC-MAIN-2026-08,1601,19488,2581638297,95520157,30384219,2026-03-13T09:59:33Z,582,0,278,0
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CC-MAIN-2026-08,1602,19483,2565678793,94359979,29292971,2026-03-13T10:27:25Z,1527,0,141,0
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CC-MAIN-2026-08,1603,19263,2551028375,92915325,29206149,2026-03-13T10:55:50Z,1379,0,324,0
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