Publish shard CC-MAIN-2026-08/00121
Browse files- README.md +13 -13
- data/CC-MAIN-2026-08/00121.parquet +3 -0
- stats.csv +4 -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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|---|---|---|---|
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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) | ~6.
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| Final Parquet (Zstd level 19) | 4.
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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 5h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 6s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h
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Publish (HuggingFace) ████████░░░░░░░░░░░░░░░░ total 1h 45m
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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 **2,933,953 documents across 150 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 150 files of CC-MAIN-2026-08 (2,933,953 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 150 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~121.6 GB | ~83 TB | — |
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| HTML extracted (uncompressed) | 363.4 GB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~6.1 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 4.2 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 363.4 GB of uncompressed HTML down to 13.0 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: ~121.6 GB of raw gzipped WARCs becomes **4.2 GB of Parquet** — a **96.6% total reduction** — containing 2,933,953 clean markdown documents.
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### Processing Times
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Pipeline timings across 150 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 5h 6m 48s avg 2m 2s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 16m 2s avg 6s
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Export (Parquet) ████░░░░░░░░░░░░░░░░░░░░ total 1h 1m 24s avg 24s
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Publish (HuggingFace) ████████░░░░░░░░░░░░░░░░ total 1h 45m 41s avg 42s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/00121.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:385efabcf9ca3a6712f374d7fd1954dd32756d6ea0271192a2798c8f8c64fbde
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size 29103618
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stats.csv
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@@ -67,6 +67,7 @@ CC-MAIN-2026-08,117,19312,2591755909,98560571,30842988,2026-03-13T07:47:28Z,78,0
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CC-MAIN-2026-08,120,19303,2550590149,96411866,30988634,2026-03-13T07:54:38Z,83,0,20,16
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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-2026-08,267,19644,2584118962,94560910,30518971,2026-03-13T07:48:52Z,211,0,23,7
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CC-MAIN-2026-08,268,19379,2550109935,94635926,30608947,2026-03-13T07:51:36Z,127,0,28,7
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CC-MAIN-2026-08,269,19718,2596135424,94594813,29413489,2026-03-13T07:53:26Z,79,0,23,7
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CC-MAIN-2026-08,270,19460,2592541531,96765785,29912858,2026-03-13T07:55:
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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-2026-08,719,19572,2625852803,96279252,30376974,2026-03-13T07:54:11Z,86,0,22,13
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CC-MAIN-2026-08,853,19694,2567973975,95901932,30303494,2026-03-13T06:50:12Z,150,0,28,80
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CC-MAIN-2026-08,866,19240,2545414991,94210985,29478780,2026-03-13T07:48:04Z,85,0,32,10
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CC-MAIN-2026-08,868,19282,2505890772,88764105,27958647,2026-03-13T07:54:00Z,120,0,19,100
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CC-MAIN-2026-08,118,19249,2506779989,92181553,28966860,2026-03-13T07:50:12Z,96,0,21,44
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CC-MAIN-2026-08,119,19231,2563038965,92964034,29641078,2026-03-13T07:52:37Z,111,0,19,12
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CC-MAIN-2026-08,120,19303,2550590149,96411866,30988634,2026-03-13T07:54:38Z,83,0,20,16
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CC-MAIN-2026-08,121,19266,2523641661,93311390,29103618,2026-03-13T07:57:05Z,126,0,20,0
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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-2026-08,269,19718,2596135424,94594813,29413489,2026-03-13T07:53:26Z,79,0,23,7
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CC-MAIN-2026-08,270,19460,2592541531,96765785,29912858,2026-03-13T07:55:22Z,84,0,22,8
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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-2026-08,852,19334,2546015208,94959847,30205044,2026-03-13T06:45:52Z,183,0,57,11
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CC-MAIN-2026-08,866,19240,2545414991,94210985,29478780,2026-03-13T07:48:04Z,85,0,32,10
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CC-MAIN-2026-08,868,19282,2505890772,88764105,27958647,2026-03-13T07:54:00Z,120,0,19,100
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