Publish shard CC-MAIN-2026-08/01151
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/01151.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 **14,
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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) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~30.
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| Final Parquet (Zstd level 19) | 20.8 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 1.8 TB of uncompressed HTML down to 65.
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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 38h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 8m
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h
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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 **14,543,559 documents across 751 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 751 files of CC-MAIN-2026-08 (14,543,559 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 751 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~608.7 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~30.8 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 20.8 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 1.8 TB of uncompressed HTML down to 65.5 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 68.2%.
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End to end: ~608.7 GB of raw gzipped WARCs becomes **20.8 GB of Parquet** — a **96.6% total reduction** — containing 14,543,559 clean markdown documents.
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### Processing Times
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Pipeline timings across 751 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 38h 11m 40s avg 3m 3s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 43m 46s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 8h 8m 43s avg 39s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 50m 34s avg 28s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/01151.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:005c9b8916b4b1e3808dacdc4aba0844f84606c56ed83ac083d08c1d810d222b
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size 31080416
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stats.csv
CHANGED
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@@ -160,7 +160,7 @@ CC-MAIN-2026-08,160,19271,2527232924,95203130,30033158,2026-03-13T11:33:44Z,288,
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CC-MAIN-2026-08,161,19411,2586897602,92915640,29432265,2026-03-13T16:00:16Z,230,0,32,13
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-
CC-MAIN-2026-08,164,19314,2593682704,93338774,30104171,2026-03-13T16:14:16Z,226,0,53,
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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-2026-08,1148,19440,2583532090,90118606,28894417,2026-03-13T16:03:16Z,193,0,65,16
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CC-MAIN-2026-08,1149,19353,2548580914,92188411,29169496,2026-03-13T16:07:16Z,193,0,48,60
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CC-MAIN-2026-08,1150,19398,2610454657,94920427,29812772,2026-03-13T16:11:16Z,200,0,34,20
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CC-MAIN-2026-08,1201,19808,2613302440,99389904,31420651,2026-03-13T11:28:27Z,244,0,40,0
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CC-MAIN-2026-08,1203,19530,2570545683,93147045,29416235,2026-03-13T11:42:05Z,324,0,27,0
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CC-MAIN-2026-08,161,19411,2586897602,92915640,29432265,2026-03-13T16:00:16Z,230,0,32,13
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CC-MAIN-2026-08,162,19489,2608515320,96148992,31443246,2026-03-13T16:05:31Z,254,0,61,24
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CC-MAIN-2026-08,163,19489,2606546923,93905029,29581409,2026-03-13T16:09:31Z,194,0,56,35
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CC-MAIN-2026-08,164,19314,2593682704,93338774,30104171,2026-03-13T16:14:16Z,226,0,53,67
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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-2026-08,1148,19440,2583532090,90118606,28894417,2026-03-13T16:03:16Z,193,0,65,16
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CC-MAIN-2026-08,1149,19353,2548580914,92188411,29169496,2026-03-13T16:07:16Z,193,0,48,60
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CC-MAIN-2026-08,1150,19398,2610454657,94920427,29812772,2026-03-13T16:11:16Z,200,0,34,20
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CC-MAIN-2026-08,1151,19858,2676987107,95696695,31080416,2026-03-13T16:15:50Z,204,0,28,0
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CC-MAIN-2026-08,1201,19808,2613302440,99389904,31420651,2026-03-13T11:28:27Z,244,0,40,0
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CC-MAIN-2026-08,1202,19636,2614718109,93578849,29619593,2026-03-13T11:36:13Z,432,0,33,0
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CC-MAIN-2026-08,1203,19530,2570545683,93147045,29416235,2026-03-13T11:42:05Z,324,0,27,0
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