Publish shard CC-MAIN-2026-08/02615
Browse files- README.md +11 -11
- data/CC-MAIN-2026-08/02615.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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| Raw WARC (.warc.gz, downloaded) | ~624.
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| HTML extracted (uncompressed) | 1.8 TB | ~295 TB | — |
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| Packed markdown WARC (.md.warc.gz) | ~31.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.
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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 67.
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End to end: ~624.
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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 43h
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 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 **14,909,623 documents across 771 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 771 files of CC-MAIN-2026-08 (14,909,623 pages total), projected to the full crawl of 100,000 WARC files.
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| Stage | 771 files (measured) | 100,000 files (projected) | Reduction |
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|---|---|---|---|
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| Raw WARC (.warc.gz, downloaded) | ~624.9 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) | ~31.6 GB | ~3.7 TB | **-98.3%** vs HTML |
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| Final Parquet (Zstd level 19) | 21.4 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 67.2 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: ~624.9 GB of raw gzipped WARCs becomes **21.4 GB of Parquet** — a **96.6% total reduction** — containing 14,909,623 clean markdown documents.
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### Processing Times
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Pipeline timings across 771 shards of CC-MAIN-2026-08:
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```
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Download (raw WARC) ████████████████████████ total 43h 28m 32s avg 3m 22s
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Convert (HTML → MD) █░░░░░░░░░░░░░░░░░░░░░░░ total 1h 50m 33s avg 8s
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Export (Parquet) █████░░░░░░░░░░░░░░░░░░░ total 9h 18m 11s avg 43s
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Publish (HuggingFace) ███░░░░░░░░░░░░░░░░░░░░░ total 5h 45m 53s avg 26s
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```
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### Dataset Charts
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data/CC-MAIN-2026-08/02615.parquet
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version https://git-lfs.github.com/spec/v1
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oid sha256:957199b3fb338e17622d43c9efae7f9215bca9797e0b3fb2ab0b391f4336b7ec
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size 30207314
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stats.csv
CHANGED
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@@ -713,6 +713,7 @@ CC-MAIN-2026-08,2582,19563,2556513838,98156888,31148205,2026-03-13T15:37:54Z,617
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CC-MAIN-2026-08,2583,19288,2578146937,96424818,29805976,2026-03-13T16:00:54Z,1319,0,71,13
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| 714 |
CC-MAIN-2026-08,2584,19484,2553112375,97091387,30756815,2026-03-13T16:21:41Z,1206,0,56,11
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| 715 |
CC-MAIN-2026-08,2614,19566,2581388744,91738092,29557124,2026-03-13T17:13:26Z,207,0,47,15
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| 716 |
CC-MAIN-2026-08,2801,19800,2573332995,93935647,29781057,2026-03-13T12:36:24Z,480,0,24,0
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| 717 |
CC-MAIN-2026-08,2802,19377,2552826046,96926255,30379332,2026-03-13T12:44:04Z,402,0,56,0
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CC-MAIN-2026-08,2810,19479,2567872535,94762671,29742907,2026-03-13T14:03:56Z,0,0,0,4
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@@ -765,7 +766,7 @@ CC-MAIN-2026-08,3088,19296,2509587425,90725535,28657729,2026-03-13T16:01:12Z,356
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CC-MAIN-2026-08,3089,19393,2567259564,89712366,28381748,2026-03-13T16:08:56Z,434,0,30,13
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| 766 |
CC-MAIN-2026-08,3090,19725,2644246878,95325452,30136348,2026-03-13T16:20:26Z,590,0,98,23
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| 767 |
CC-MAIN-2026-08,3091,19396,2586632962,92038056,29116167,2026-03-13T16:23:56Z,172,0,32,23
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CC-MAIN-2026-08,3119,19460,2584493930,93876776,31478880,2026-03-13T17:15:26Z,454,0,25,
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CC-MAIN-2026-08,3551,19488,2583454997,93104559,29560362,2026-03-13T12:14:48Z,219,0,44,0
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CC-MAIN-2026-08,3552,19589,2622893447,95992637,29462588,2026-03-13T12:17:56Z,162,0,24,0
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CC-MAIN-2026-08,3553,19595,2591041524,96226434,30415440,2026-03-13T12:21:13Z,166,0,31,0
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CC-MAIN-2026-08,2583,19288,2578146937,96424818,29805976,2026-03-13T16:00:54Z,1319,0,71,13
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CC-MAIN-2026-08,2584,19484,2553112375,97091387,30756815,2026-03-13T16:21:41Z,1206,0,56,11
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| 715 |
CC-MAIN-2026-08,2614,19566,2581388744,91738092,29557124,2026-03-13T17:13:26Z,207,0,47,15
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CC-MAIN-2026-08,2615,19805,2626737496,95131439,30207314,2026-03-13T17:17:25Z,208,0,34,0
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CC-MAIN-2026-08,2801,19800,2573332995,93935647,29781057,2026-03-13T12:36:24Z,480,0,24,0
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CC-MAIN-2026-08,2802,19377,2552826046,96926255,30379332,2026-03-13T12:44:04Z,402,0,56,0
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CC-MAIN-2026-08,2810,19479,2567872535,94762671,29742907,2026-03-13T14:03:56Z,0,0,0,4
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CC-MAIN-2026-08,3089,19393,2567259564,89712366,28381748,2026-03-13T16:08:56Z,434,0,30,13
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CC-MAIN-2026-08,3090,19725,2644246878,95325452,30136348,2026-03-13T16:20:26Z,590,0,98,23
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CC-MAIN-2026-08,3091,19396,2586632962,92038056,29116167,2026-03-13T16:23:56Z,172,0,32,23
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CC-MAIN-2026-08,3119,19460,2584493930,93876776,31478880,2026-03-13T17:15:26Z,454,0,25,15
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CC-MAIN-2026-08,3551,19488,2583454997,93104559,29560362,2026-03-13T12:14:48Z,219,0,44,0
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CC-MAIN-2026-08,3552,19589,2622893447,95992637,29462588,2026-03-13T12:17:56Z,162,0,24,0
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| 772 |
CC-MAIN-2026-08,3553,19595,2591041524,96226434,30415440,2026-03-13T12:21:13Z,166,0,31,0
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